chore(deps): update dependency @grpc/proto-loader to ^0.8.0

Author: renovate-bot

package.json

@@ -93,7 +93,7 @@
     "@babel/core": "^7.22.11",
     "@google-cloud/pubsub": "^4.0.0",
     "@grpc/grpc-js": "^1.0.3",
-    "@grpc/proto-loader": "^0.7.0",
+    "@grpc/proto-loader": "^0.8.0",
     "@types/async-retry": "^1.4.3",
     "@types/duplexify": "^3.6.4",
     "@types/mime": "^3.0.0",