Add descriptive labels for dependabot groups

Author: jbampton

.github/dependabot.yml

@@ -6,22 +6,22 @@ updates:
     schedule:
       interval: 'daily'
     groups:
-      github-dependencies:
+      bundler-dependencies:
         patterns:
           - '*'
   - package-ecosystem: 'github-actions'
     directory: '/'
     schedule:
       interval: 'daily'
     groups:
-      github-dependencies:
+      github-actions-dependencies:
         patterns:
           - '*'
   - package-ecosystem: 'pre-commit'
     directory: '/'
     schedule:
       interval: 'daily'
     groups:
-      github-dependencies:
+      pre-commit-hooks:
         patterns:
           - '*'