refactor: update side-nav styles to use margin shorthand

[web-padawan]

Description

Fixed two more warnings reported by upgrading to Stylelint 16:

packages/side-nav/theme/lumo/vaadin-side-nav-styles.js
  50:5  ✖  Expected shorthand property "margin-inline"  declaration-block-no-redundant-longhand-properties

packages/side-nav/theme/material/vaadin-side-nav-styles.js
  41:5  ✖  Expected shorthand property "margin-inline"  declaration-block-no-redundant-longhand-properties

Type of change

• Refactor

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[vaadin-bot]

This ticket/PR has been released with Vaadin 24.5.0.alpha10 and is also targeting the upcoming stable 24.5.0 version.