chore: add codeql-action to dependabot config

Author: jsjoeio

.github/dependabot.yml

@@ -9,6 +9,7 @@ updates:
       # GitHub always delivers the latest versions for each major
       # release tag, so handle updates manually
       - dependency-name: "actions/*"
+      - dependency-name: "github/codeql-action/*"
 
   - package-ecosystem: "npm"
     directory: "/"