maint: reduce frequency of scheduled workflows and autoupdates

[Remi-Gau]

• scheduled workflow to run every 2 months
• dependabot twice a year

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request aims to optimize repository maintenance by significantly reducing the frequency of automated updates. Specifically, it adjusts the Dependabot schedule to run less often, thereby decreasing the number of pull requests generated for dependency updates and streamlining the maintenance process.

Highlights

• Dependabot Schedule: The Dependabot schedule for GitHub Actions updates has been changed from weekly to semiannually, reducing the frequency of automated dependency updates.

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Changelog

• .github/dependabot.yml
  • Changed the interval for GitHub Actions package ecosystem updates from weekly to semiannually.

Ignored Files

• Ignored by pattern: .github/workflows/** (3)
  • .github/workflows/bootstrap.yml
  • .github/workflows/test_doc.yml
  • .github/workflows/update_precommit_hooks.yml

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[gemini-code-assist]

Code Review

This pull request modifies the Dependabot configuration to reduce the frequency of updates for GitHub Actions to semiannually. While this change aims to decrease the frequency of autoupdates, it introduces a potential security concern regarding the update cadence for critical GitHub Actions.

[gemini-code-assist]

Reducing the update interval for github-actions to semiannually could increase the exposure window to security vulnerabilities in the actions. For critical infrastructure components like GitHub Actions, more frequent updates are generally recommended to mitigate security risks. Consider setting the interval to quarterly or monthly to maintain a better security posture while still reducing update frequency from weekly.

        interval: quarterly