fix(deps): update dependency google/cloud-speech to v2 (#2124)

Author: renovate-bot

appengine/standard/grpc/composer.json

@@ -2,7 +2,7 @@
     "require": {
         "google/cloud-spanner": "^1.15.0",
         "google/cloud-monitoring": "^2.0.0",
-        "google/cloud-speech": "^1.0.0"
+        "google/cloud-speech": "^2.0.0"
     },
     "require-dev": {
         "paragonie/random_compat": "^9.0.0"