chore: Allow dependabot monitor github actions (#262)

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**Description**


https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot#enabling-dependabot-version-updates-for-actions



**Related issue(s)**
<!-- If you refer to a particular issue, provide its number. For
example, `Resolves #123`, `Fixes #43`, or `See also #33`. -->

.github/dependabot.yml

@@ -2,6 +2,12 @@
 
 version: 2
 updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: "chore(dependabot)"
   - package-ecosystem: "gomod"
     directory: "/"
     labels: