Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `app/javascript/styles/fonts/montserrat.scss`:
  Code style changes upstream, path changes in glitch-soc.
  Applied upstream's code style changes.
- `app/javascript/styles/fonts/roboto-mono.scss`:
  Code style changes upstream, path changes in glitch-soc.
  Applied upstream's code style changes.
- `app/javascript/styles/fonts/roboto.scss`:
  Code style changes upstream, path changes in glitch-soc.
  Applied upstream's code style changes.
- `app/models/account.rb`:
  Textual conflict only caused by glitch-soc using a different value
  for character limits in a nearby line.
  Applied upstream's changes.
- `app/views/statuses/_simple_status.html.haml`:
  Attribute added to a tag modified by glitch-soc.
  Added upstream's attributes.
- `yarn.lock`:
  Upstream added/updated dependencies close to glitch-soc-only ones.
  Updated/added upstream dependencies.

app/javascript/styles/mastodon/admin.scss

@@ -183,12 +183,9 @@ $content-width: 840px;
 
     &-heading {
       display: flex;
-
       padding-bottom: 36px;
       border-bottom: 1px solid lighten($ui-base-color, 8%);
-
       margin: -15px -15px 40px 0;
-
       flex-wrap: wrap;
       align-items: center;
       justify-content: space-between;
@@ -294,7 +291,7 @@ $content-width: 840px;
       width: 100%;
       height: 0;
       border: 0;
-      border-bottom: 1px solid rgba($ui-base-lighter-color, .6);
+      border-bottom: 1px solid rgba($ui-base-lighter-color, 0.6);
       margin: 20px 0;
 
       &.spacer {