Add workflow_dispatch trigger to all workflows

[Copilot]

GitHub pauses scheduled/event-driven workflows on inactive repositories, blocking security PRs that depend on them. Adding workflow_dispatch allows maintainers to manually trigger runs to unblock these.

Changes

• auto-merge-dependabot.yml — added workflow_dispatch trigger
• conflicting-pr-label.yml — added workflow_dispatch trigger

release.yml, ruby.yml, and code-ql.yml already had this trigger and were left unchanged.

Original prompt

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This section details on the original issue you should resolve

<issue_title>update all workflows to accept a workflow dispath trigger</issue_title>
<issue_description>some workflows got paused due to repository inactivity, and we need to manually queue runs to unblock security PRs</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes update all workflows to accept a workflow dispath trigger #61

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud