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

Conflicts:
- `.github/dependabot.yml`:
  Changed upstream, while we modified it in glitch-soc to not get spammed
  by dependabot.
  Kept it removed.
- `README.md`:
  Changed upstream, which has a very different version.
  Discarded upstream changes.

app/javascript/styles/mastodon/admin.scss

@@ -133,12 +133,12 @@ $content-width: 840px;
 
       .simple-navigation-active-leaf a {
         color: $primary-text-color;
-        background-color: $ui-highlight-color;
+        background-color: darken($ui-highlight-color, 2%);
         border-bottom: 0;
         border-radius: 0;
 
         &:hover {
-          background-color: lighten($ui-highlight-color, 5%);
+          background-color: $ui-highlight-color;
         }
       }
     }
@@ -901,7 +901,7 @@ a.name-tag,
     border: 0;
 
     a {
-      color: lighten($ui-highlight-color, 8%);
+      color: $highlight-text-color;
     }
 
     dl:first-child .verified {