Add Dependabot ignores for stuck updates and those needing manual interventions (#23966)

.github/dependabot.yml

@@ -12,6 +12,36 @@ updates:
     open-pull-requests-limit: 99
     allow:
       - dependency-type: direct
+    ignore:
+      # This version needs to match Rails major version, so stick to 6.x only
+      - dependency-name: '@rails/ujs'
+        versions:
+          - '7.x'
+      # TODO: This version got stuck in https://github.com/mastodon/mastodon/pull/14004 and this should be deleted to fix
+      - dependency-name: 'pg'
+        versions:
+          - '8.x'
+      # TODO: This was ignored in https://github.com/mastodon/mastodon/pull/19120
+      - dependency-name: 'uuid'
+        versions:
+          - '9.x'
+      # TODO: This version got stuck in https://github.com/mastodon/mastodon/pull/14073 and this should be deleted to fix
+      - dependency-name: 'history'
+        versions:
+          - '5.x'
+      # TODO: This requires code changes for migration
+      - dependency-name: 'tesseract.js'
+        versions:
+          - '3.x'
+          - '4.x'
+      # TODO: This version needs manual updates for breaking changes
+      - dependency-name: 'react-hotkeys'
+        versions:
+          - '2.x'
+      # TODO: This version got stuck in https://github.com/mastodon/mastodon/pull/15206 and this should be deleted to fix
+      - dependency-name: 'terser'
+        versions:
+          - '5.x'
 
   - package-ecosystem: bundler
     directory: '/'
@@ -20,6 +50,15 @@ updates:
     open-pull-requests-limit: 99
     allow:
       - dependency-type: direct
+    ignore:
+      # This version needs to match Rails major version, so stick to 6.x only
+      - dependency-name: 'rails-i18n'
+        versions:
+          - '7.x'
+      # This version needs manual updates https://github.com/rails/sprockets/blob/master/UPGRADING.md#guide-to-upgrading-from-sprockets-3x-to-4x
+      - dependency-name: 'sprockets'
+        versions:
+          - '4.x'
 
   - package-ecosystem: github-actions
     directory: '/'