fix(deps): update dependency protobufjs to v8

Author: renovate-bot

package.json

@@ -81,7 +81,7 @@
     "lodash.snakecase": "^4.1.1",
     "merge-stream": "^2.0.0",
     "p-queue": "^6.0.2",
-    "protobufjs": "^7.4.0",
+    "protobufjs": "^8.0.0",
     "retry-request": "^8.0.0",
     "split-array-stream": "^2.0.0",
     "stack-trace": "0.0.10",

samples/package.json

@@ -18,7 +18,7 @@
     "@google-cloud/kms": "^5.0.0",
     "@google-cloud/precise-date": "^5.0.0",
     "@google-cloud/spanner": "^8.3.1",
-    "protobufjs": "^7.0.0",
+    "protobufjs": "^8.0.0",
     "yargs": "^17.0.0"
   },
   "devDependencies": {