chore: update client_documentation and issue_tracker in .repo-metadata.json (#31)

* chore: update client_documentation and issue_tracker in .repo-metadata.json

* remove client_documentation value

Author: parthea

packages/google-cloud-documentai-toolbox/.repo-metadata.json

@@ -1,7 +1,8 @@
 {
     "name": "documentai-toolbox",
     "name_pretty": "Document AI Toolbox",
-    "issue_tracker": "",
+    "issue_tracker": "https://github.com/googleapis/python-documentai-toolbox/issues",
+    "client_documentation": "",
     "release_level": "preview",
     "language": "python",
     "library_type": "OTHER",