build(bazel): add missing dependency to deploy script

Cannot load the root package.json. Surfaced after trying to merge
aio-bazel-migration to main because the deployment short circuits
on ci for feature branhces.

aio/scripts/deploy-to-firebase/BUILD.bazel

@@ -10,6 +10,7 @@ DEPLOY_TO_FIREBASE_SOURCES = glob(
 DEPLOY_TO_FIREBASE_DEPS = [
     "@aio_npm//shelljs",
     "//aio:build",
+    "//:package.json",
 ]
 
 nodejs_binary(