Upgrade GitHub Actions to latest versions

[salmanmkc]

Summary

Upgrade GitHub Actions to their latest versions for improved features, bug fixes, and security updates.

Changes

Action	Old Version(s)	New Version	Release	Files
codecov/codecov-action	v4	v5	Release	nightly_coverage.yml

Why upgrade?

Keeping GitHub Actions up to date ensures:

• Security: Latest security patches and fixes
• Features: Access to new functionality and improvements
• Compatibility: Better support for current GitHub features
• Performance: Optimizations and efficiency improvements

Security Note

Actions that were previously pinned to commit SHAs remain pinned to SHAs (updated to the latest release SHA) to maintain the security benefits of immutable references.

Testing

These changes only affect CI/CD workflow configurations and should not impact application functionality. The workflows should be tested by running them on a branch before merging.

[CLAassistant]

All committers have signed the CLA.

[Cuiyus]

Update your submission!
I have been paying attention to and learning about the recent updates on GitHub Actions, which is very effective for building a stable and efficient CI for zvec.

[salmanmkc]

Update your submission! I have been paying attention to and learning about the recent updates on GitHub Actions, which is very effective for building a stable and efficient CI for zvec.

Thanks did you mean update the branch? Glad you find GitHub actions a stable and efficient solution for zvec!