docs(subnav): update best practices

[marionnegp]

What I did

1. Updated <rh-subnav> "Best practices" section to a do/don't format

Testing Instructions

1. Check subnav's "Best practices" in DP

Notes to Reviewers

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Latest commit: 80110a2

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[github-actions]

Size Change: 0 B

Total Size: 207 kB

ℹ️ View Unchanged

Filename	Size
./elements.js	473 B
./elements/rh-accordion/context.js	162 B
./elements/rh-accordion/rh-accordion-header.js	2.77 kB
./elements/rh-accordion/rh-accordion-panel.js	1.37 kB
./elements/rh-accordion/rh-accordion.js	3.21 kB
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./elements/rh-footer/rh-footer-social-link.js	964 B
./elements/rh-footer/rh-footer-universal.js	4.05 kB
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./elements/rh-icon/ssr.js	181 B
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./elements/rh-navigation-secondary/rh-navigation-secondary-overlay.js	571 B
./elements/rh-navigation-secondary/rh-navigation-secondary.js	5.31 kB
./elements/rh-navigation-secondary/test/fixtures.js	769 B
./elements/rh-pagination/rh-pagination.js	5.46 kB
./elements/rh-site-status/rh-site-status.js	2.5 kB
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./elements/rh-spinner/rh-spinner.js	1.43 kB
./elements/rh-stat/rh-stat.js	2.2 kB
./elements/rh-subnav/rh-subnav.js	2.73 kB
./elements/rh-surface/rh-surface.js	1.11 kB
./elements/rh-surface/test/elements.js	423 B
./elements/rh-switch/rh-switch.js	2.93 kB
./elements/rh-table/rh-sort-button.js	1.49 kB
./elements/rh-table/rh-table.js	3.54 kB
./elements/rh-tabs/context.js	160 B
./elements/rh-tabs/rh-tab-panel.js	1.04 kB
./elements/rh-tabs/rh-tab.js	3.02 kB
./elements/rh-tabs/rh-tabs.js	3.77 kB
./elements/rh-tag/rh-tag.js	2.84 kB
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./elements/rh-timestamp/rh-timestamp.js	983 B
./elements/rh-tooltip/rh-tooltip.js	2.24 kB
./elements/rh-video-embed/rh-video-embed.js	4.6 kB
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./lib/context/color/controller.js	947 B
./lib/context/color/provider.js	2.18 kB
./lib/context/event.js	593 B
./lib/context/headings/consumer.js	722 B
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./lib/context/headings/provider.js	1.24 kB
./lib/DirController.js	565 B
./lib/elements/rh-context-demo/rh-context-demo.js	1.28 kB
./lib/elements/rh-context-picker/rh-context-picker.js	2.24 kB
./lib/environment.js	194 B
./lib/functions.js	175 B
./lib/I18nController.js	1.38 kB
./lib/ScreenSizeController.js	849 B
./lib/ssr-controller.js	251 B
./react/rh-accordion/rh-accordion-header.js	199 B
./react/rh-accordion/rh-accordion-panel.js	185 B
./react/rh-accordion/rh-accordion.js	215 B
./react/rh-alert/rh-alert.js	184 B
./react/rh-audio-player/rh-audio-player-about.js	191 B
./react/rh-audio-player/rh-audio-player-rate-stepper.js	213 B
./react/rh-audio-player/rh-audio-player-scrolling-text-overflow.js	214 B
./react/rh-audio-player/rh-audio-player-subscribe.js	196 B
./react/rh-audio-player/rh-audio-player.js	183 B
./react/rh-audio-player/rh-cue.js	195 B
./react/rh-audio-player/rh-transcript.js	207 B
./react/rh-avatar/rh-avatar.js	173 B
./react/rh-back-to-top/rh-back-to-top.js	183 B
./react/rh-badge/rh-badge.js	174 B
./react/rh-blockquote/rh-blockquote.js	179 B
./react/rh-breadcrumb/rh-breadcrumb.js	179 B
./react/rh-button/rh-button.js	174 B
./react/rh-card/rh-card.js	172 B
./react/rh-code-block/rh-code-block.js	181 B
./react/rh-cta/rh-cta.js	170 B
./react/rh-dialog/rh-dialog.js	203 B
./react/rh-footer/rh-footer-block.js	184 B
./react/rh-footer/rh-footer-copyright.js	187 B
./react/rh-footer/rh-footer-links.js	185 B
./react/rh-footer/rh-footer-social-link.js	193 B
./react/rh-footer/rh-footer-universal.js	188 B
./react/rh-footer/rh-footer.js	174 B
./react/rh-health-index/rh-health-index.js	184 B
./react/rh-icon/rh-icon.js	202 B
./react/rh-menu/rh-menu.js	173 B
./react/rh-navigation-secondary/rh-navigation-secondary-dropdown.js	217 B
./react/rh-navigation-secondary/rh-navigation-secondary-menu-section.js	205 B
./react/rh-navigation-secondary/rh-navigation-secondary-menu.js	199 B
./react/rh-navigation-secondary/rh-navigation-secondary-overlay.js	201 B
./react/rh-navigation-secondary/rh-navigation-secondary.js	213 B
./react/rh-pagination/rh-pagination.js	178 B
./react/rh-site-status/rh-site-status.js	181 B
./react/rh-skip-link/rh-skip-link.js	181 B
./react/rh-spinner/rh-spinner.js	175 B
./react/rh-stat/rh-stat.js	171 B
./react/rh-subnav/rh-subnav.js	175 B
./react/rh-surface/rh-surface.js	175 B
./react/rh-switch/rh-switch.js	185 B
./react/rh-table/rh-sort-button.js	213 B
./react/rh-table/rh-table.js	174 B
./react/rh-tabs/rh-tab-panel.js	181 B
./react/rh-tabs/rh-tab.js	187 B
./react/rh-tabs/rh-tabs.js	174 B
./react/rh-tag/rh-tag.js	182 B
./react/rh-tile/rh-tile-group.js	183 B
./react/rh-tile/rh-tile.js	194 B
./react/rh-timestamp/rh-timestamp.js	176 B
./react/rh-tooltip/rh-tooltip.js	175 B
./react/rh-video-embed/rh-video-embed.js	227 B
./uxdot/uxdot-best-practice.js	742 B
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