Merge commit '96bcee66fba582666259d1d7785c3a7f2a72b8aa' into glitch-soc/merge-upstream

Conflicts:
- `.github/workflows/build-nightly.yml`:
  Upstream changed how the nightly builds are versioned, the conflict
  is because glitch-soc modified adjacent lines relative to the docker
  repositories the images are pushed to.
  Applied upstream's changes.
- `app/views/settings/preferences/notifications/show.html.haml`:
  Upstream moved some settings around. Glitch-soc had more settings.
  Applied upstream's changes, moving glitch-soc's extra settings
  accordingly.

.github/workflows/build-nightly.yml

@@ -16,7 +16,7 @@ jobs:
         env:
           TZ: Etc/UTC
         run: |
-          echo mastodon_version_suffix=nightly-$(date +'%Y-%m-%d')>> $GITHUB_OUTPUT
+          echo mastodon_version_suffix=nightly.$(date +'%Y-%m-%d')>> $GITHUB_OUTPUT
     outputs:
       suffix: ${{ steps.version_vars.outputs.mastodon_version_suffix }}
 
@@ -28,8 +28,8 @@ jobs:
       use_native_arm64_builder: false
       push_to_images: |
         ghcr.io/${{ github.repository_owner }}/mastodon
-      # The `+` is important here, result will be v4.1.2+nightly-2022-03-05
-      version_suffix: +${{ needs.compute-suffix.outputs.suffix }}
+      # The `-` is important here, result will be v4.1.2-nightly.2022-03-05
+      version_suffix: -${{ needs.compute-suffix.outputs.suffix }}
       labels: |
         org.opencontainers.image.description=Nightly build image used for testing purposes
       flavor: |