Pin GitHub Action digests to semantic versions in Renovate config

[Copilot]

Updated the Renovate configuration to include helpers:pinGitHubActionDigestsToSemver in the extends array. This helper ensures that GitHub Actions are pinned to their digest values while maintaining semantic version references in comments, improving security while keeping the configuration readable.

Changes made:

• Added "helpers:pinGitHubActionDigestsToSemver" to the extends array in renovate.json
• No other modifications were made to preserve existing configuration

Before:

"extends": [
  "config:base"
]

After:

"extends": [
  "config:base",
  "helpers:pinGitHubActionDigestsToSemver"
]

This change aligns with security best practices by ensuring GitHub Actions are pinned to specific commit digests while maintaining readability through semantic version comments.

Fixes #28.

---

💬 Share your feedback on Copilot coding agent for the chance to win a $200 gift card! Click here to start the survey.