docs: code installation tabs

[bennypowers]

Fixes #1361

What I did

1. fix my careless error from fc27b79

Testing Instructions

1. check the DP, see if the tabs (a) work and (b) look right

[changeset-bot]

⚠️ No Changeset found

Latest commit: a3d714a

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[github-actions]

Size Change: 0 B

Total Size: 210 kB

ℹ️ View Unchanged

Filename	Size
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_{compressed-size-action}