fix(deps): update dependency google/cloud-dlp to v2 (#2055)

Author: renovate-bot

dlp/composer.json

@@ -2,7 +2,7 @@
     "name": "google/dlp-sample",
     "type": "project",
     "require": {
-        "google/cloud-dlp": "^1.12",
+        "google/cloud-dlp": "^2.0",
         "google/cloud-pubsub": "^2.0"
     }
 }