chore: renovate bot setting to pin actions to a full length commit SHA (#3189)

- https://docs.renovatebot.com/modules/manager/github-actions/#additional-information

- Pinned actions by SHA https://github.com/ossf/scorecard/blob/main/docs/checks.md#pinned-dependencies

>Pin actions to a full length commit SHA

>Pinning an action to a full length commit SHA is currently the only way to use an action as an immutable release.
> Pinning to a particular SHA helps mitigate the risk of a bad actor adding a backdoor to the action's repository,
> as they would need to generate a SHA-1 collision for a valid Git object payload.

- https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-third-party-actions
- b0c3aa85ef/default.json (L13)

renovate.json

@@ -1,5 +1,5 @@
 {
-  "extends": ["config:base", "schedule:earlyMondays"],
+  "extends": ["config:base", "schedule:earlyMondays","helpers:pinGitHubActionDigests"],
   "prConcurrentLimit": 1,
   "ignorePaths": ["docker-examples/**"],
   "ignoreDeps": ["eslint-plugin-verdaccio", "@verdaccio/test-helper"],