VLN-1387: remediate missing-dependency-cooldown

[picatz]

🏕️ This pull request was created by camper, an automated security campaign tool.

Finding

Rule	missing-dependency-cooldown
Severity	MEDIUM
Repository	temporalio/docker-builds
Ticket	VLN-1387

Summary

• .github/dependabot.yml: Updated all existing Dependabot ecosystems to use weekly schedules and added cooldown: default-days: 14 for each; added a new github-actions ecosystem entry with weekly schedule and 14-day cooldown.

Instructions

• Approve to merge this fix
• Request changes to trigger a new remediation attempt
• /camper rebase — rebase onto the base branch
• /camper close — close this PR without merging
• /camper retry — close and retry with a new fix

[picatz]

This PR has had no activity for 7 days and may need attention.

Actions you can take:

• Review and approve if the changes look good
• Close if this fix is no longer needed
• Comment /camper rebase to rebase onto the latest base branch
• Comment /camper retry to regenerate the fix

[picatz]

This PR has had no activity for 9 days and may need attention.

Actions you can take:

• Review and approve if the changes look good
• Close if this fix is no longer needed
• Comment /camper rebase to rebase onto the latest base branch
• Comment /camper retry to regenerate the fix

[picatz]

This PR has had no activity for 7 days and may need attention.

Actions you can take:

• Review and approve if the changes look good
• Close if this fix is no longer needed
• Comment /camper rebase to rebase onto the latest base branch
• Comment /camper retry to regenerate the fix

[picatz]

This PR has been open for 30 days, exceeding the 30-day maximum lifetime. Auto-closing to free resources. If the fix is still needed, please open a new remediation attempt.

[picatz]

Closing this PR: exceeded 30-day max lifetime