revert(deps): remove Critical Security Actions renovate rule

Removed the Critical Security Actions package rule that was preventing
automerge for patch updates to actions/checkout, 1password/*, and
tailscale/github-action.

These security-critical actions will now follow the standard GitHub
Actions automerge behavior for minor/patch updates.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: owine

.github/renovate.json

@@ -45,27 +45,6 @@
         "major"
       ],
       "minimumReleaseAge": "3 days"
-    },
-    {
-      "groupName": "Critical Security Actions",
-      "matchManagers": [
-        "github-actions"
-      ],
-      "matchPackagePatterns": [
-        "^actions/checkout",
-        "^1password/",
-        "^tailscale/github-action"
-      ],
-      "matchUpdateTypes": [
-        "patch"
-      ],
-      "automerge": false,
-      "minimumReleaseAge": "3 days",
-      "labels": [
-        "security",
-        "dependencies",
-        "review-required"
-      ]
     }
   ]
 }