fixup: scope selector-flags with flagSetId to avoid store collision

Signed-off-by: Todd Baert <todd.baert@dynatrace.com>

Author: toddbaert

flags/selector-flags.json

@@ -16,5 +16,8 @@
       },
       "defaultVariant": "on"
     }
+  },
+  "metadata": {
+    "flagSetId": "selector-set"
   }
 }