Build/Test Tools: Create groups for bundled theme Dependabot PRs.

Follow up to [60347].

See #63170, #63171.

git-svn-id: https://develop.svn.wordpress.org/trunk@60349 602fd350-edb4-49c9-b593-d223f7449a82

Author: desrosj

.github/dependabot.yml

@@ -135,26 +135,57 @@ updates:
       interval: "weekly"
     open-pull-requests-limit: 20
     groups:
-      twentytwentyone:
+      twentytwentyone-sass-css:
         patterns:
-          - "*"
+          - "**browserslist*"
+          - "autoprefixer"
+          - "*css*"
+          - "*sass*"
+          - "!*stylelint*"
+      twentytwentyone-eslint:
+        patterns:
+          - "**eslint*"
+      twentytwentyone-stylelint:
+        patterns:
+          - "**stylelint*"
+      twentytwentyone-miscellaneous:
+        patterns:
+          - "chokidar-cli"
+          - "minimist"
+          - "npm-run-all"
 
   - package-ecosystem: "npm"
     directory: "/src/wp-content/themes/twentytwenty"
     schedule:
       interval: "weekly"
     open-pull-requests-limit: 20
     groups:
-      twentytwenty:
+      twentytwenty-css:
         patterns:
-          - "*"
+          - "**browserslist*"
+          - "autoprefixer"
+          - "*css*"
+      twentytwenty-stylelint:
+        patterns:
+          - "*stylelint*"
+      twentytwenty-miscellaneous:
+        patterns:
+          - "concurrently"
+          - "@wordpress/scripts"
 
   - package-ecosystem: "npm"
     directory: "/src/wp-content/themes/twentynineteen"
     schedule:
       interval: "weekly"
     open-pull-requests-limit: 20
     groups:
-      twentynineteen:
+      twentynineteen-css-sass:
         patterns:
-          - "*"
+          - "**browserslist*"
+          - "autoprefixer"
+          - "*css*"
+          - "*sass*"
+      twentynineteen-miscellaneous:
+        patterns:
+          - "chokidar-cli"
+          - "npm-run-all"