Merge pull request mruby#6736 from jbampton/add-dependabot-pre-commit

Author: matz

.github/dependabot.yml

@@ -5,11 +5,27 @@ updates:
     directory: "/"
     schedule:
       interval: "daily"
+    groups:
+      bundler-dependencies:
+        patterns:
+          - "*"
     cooldown:
       default-days: 7
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
       interval: "daily"
+    groups:
+      github-actions-dependencies:
+        patterns:
+          - "*"
     cooldown:
       default-days: 7
+  - package-ecosystem: "pre-commit"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    groups:
+      pre-commit-hooks:
+        patterns:
+          - "*"