Dependabot to update pre-commit instead of custom workflows

Author: Joel Peter

.github/dependabot.yml

@@ -17,3 +17,8 @@ updates:
     directory: "/"
     patterns: ["*"]
     multi-ecosystem-group: "dependencies"
+
+  - package-ecosystem: "pre-commit"
+    directory: "/"
+    patterns: ["*"]
+    multi-ecosystem-group: "dependencies"