chore(ci): group dependabot updates for GitHub Actions (#158)

This will help limit the number of update individual PRs that need to be
improved one by one

Author: zerosnacks

.github/dependabot.yml

@@ -4,3 +4,11 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+    commit-message:
+      prefix: "chore(deps)"
+    open-pull-requests-limit: 1
+    groups:
+      github-actions-weekly:
+        applies-to: "version-updates"
+        patterns: ["*"]
+        update-types: ["minor", "patch"]