fix: fixed the token-permission and pinned dependencies issue

[harshitasao]

fixed the token-permission and pinned dependencies issue reported by scorecard.

Checklist

• When introducing a new scaler, I agree with the scaling governance policy
• I have verified that my change is according to the deprecations & breaking changes policy
• Tests have been added
• Changelog has been updated and is aligned with our changelog requirements
• A PR is opened to update our Helm chart (repo) (if applicable, ie. when deployment manifests are modified)
• A PR is opened to update the documentation on (repo) (if applicable)
• Commits are signed with Developer Certificate of Origin (DCO - learn more)

Part of #6085

[tomkerkhove]

Let's improve it to make it more clear.

Suggested change

	- **General**: Fixed the token-permission and pinned-dependencies issue reported by the scorecard. ([#6085](https://github.com/kedacore/keda/issues/6085))
	- **General**: Lock down GitHub token permissions ([#6085](https://github.com/kedacore/keda/issues/6085))
	- **General**: Pin GitHub Action actions to specific version ([#6085](https://github.com/kedacore/keda/issues/6085))

Also, please move this under improvements as this is not a fix for KEDA itself

[zroubalik]

To the Other section please

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.