feat(sec): add sec label and allow automerge (#66)

Reviewed-on: #66
Reviewed-by: branch-buddy <branch-buddy@t00n.de>
Co-authored-by: Timo Behrendt <t.behrendt@t00n.de>
Co-committed-by: Timo Behrendt <t.behrendt@t00n.de>

common.json

@@ -20,6 +20,11 @@
   ],
   "osvVulnerabilityAlerts": true,
   "vulnerabilityAlerts": {
-    "enabled": true
+    "enabled": true,
+    "automerge": true,
+    "platformAutomerge": true,
+    "automergeType": "pr",
+    "addLabels": ["automerge", "security"],
+    "vulnerabilityFixStrategy": "lowest"
   }
 }