remove rules-unit-testing from ignore list

Author: Feiyang1

.changeset/config.json

@@ -16,8 +16,7 @@
     "firebase-compat-interop-test",
     "firebase-compat-typings-test",
     "@firebase/changelog-generator",
-    "firebase-size-analysis",
-    "@firebase/rules-unit-testing"
+    "firebase-size-analysis"
   ],
   "___experimentalUnsafeOptions_WILL_CHANGE_IN_PATCH": {
     "onlyUpdatePeerDependentsWhenOutOfRange": true,