fix: docker-compose label to just be docker (#3)

The label added for docker-compose related package updates is supposed to be "docker" and not "docker-compose".

Reviewed-on: #3
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>

docker-compose.json

@@ -4,6 +4,6 @@
     "digest": {
       "enabled": true
     },
-    "addLabels": ["deps", "docker-compose"]
+    "addLabels": ["deps", "docker"]
   }
 }