Expand docs menu by default

This commit makes the docs menus expanded by default instead of
collapsed by default, for two reasons:

1. We don't actually have many pages in the docs section, so there's no
   need to save space.
2. Expanding by default makes the site more functional with JS disabled.

layouts/partials/sidebar/docs-menu.html

@@ -2,14 +2,12 @@
   <ul class="list-unstyled collapsible-sidebar">
   {{ $currentPage := . -}}
   {{ range $index, $element := .Site.Menus.docs -}}
-  {{- $active := or ($currentPage.IsMenuCurrent "docs" .) ($currentPage.HasMenuCurrent "docs" .) -}}
-  {{- $active = or $active (eq $currentPage.Section .Identifier) -}}
     <li class="mb-1">
-      <button class="btn btn-toggle align-items-center rounded collapsed" data-bs-toggle="collapse" data-bs-target="#section-{{ .Identifier }}" aria-expanded="{{ if $active }}true{{ else }}false{{ end }}">
+      <button class="btn btn-toggle align-items-center rounded collapsed" data-bs-toggle="collapse" data-bs-target="#section-{{ .Identifier }}" aria-expanded="true">
         {{ .Name }}
       </button>
       {{ if .HasChildren -}}
-      <div class="collapse{{ if $active }} show{{ end }}" id="section-{{ .Identifier }}">
+      <div class="collapse show" id="section-{{ .Identifier }}">
         <ul class="btn-toggle-nav list-unstyled fw-normal pb-1 small">
         {{ range .Children -}}
           {{- $active := or ($currentPage.IsMenuCurrent "docs" .) ($currentPage.HasMenuCurrent "docs" .) -}}
@@ -36,4 +34,4 @@ <h3 class="h6 text-uppercase">{{ .Name }}</h3>
     </ul>
     {{ end -}}
   {{ end -}}
-{{ end -}}
+{{ end -}}