Fix links to googleapis.dev (#8998)

Author: busunkim96

.repo-metadata.json

@@ -2,7 +2,7 @@
   "name": "cloudtasks",
   "name_pretty": "Cloud Tasks",
   "product_documentation": "https://cloud.google.com/tasks/docs/",
-  "client_documentation": "https://googleapis.dev/python/tasks/latest",
+  "client_documentation": "https://googleapis.dev/python/cloudtasks/latest",
   "issue_tracker": "https://issuetracker.google.com/savedsearches/5433985",
   "release_level": "ga",
   "language": "python",

README.rst

@@ -20,7 +20,7 @@ requests.
 .. |compat_check_github| image:: https://python-compatibility-tools.appspot.com/one_badge_image?package=git%2Bgit%3A//github.com/googleapis/google-cloud-python.git%23subdirectory%3Dtasks
    :target: https://python-compatibility-tools.appspot.com/one_badge_target?package=git%2Bgit%3A//github.com/googleapis/google-cloud-python.git%23subdirectory%3Dtasks
 .. _Cloud Tasks API: https://cloud.google.com/tasks
-.. _Client Library Documentation: https://googleapis.dev/python/tasks/latest
+.. _Client Library Documentation: https://googleapis.dev/python/cloudtasks/latest
 .. _Product Documentation:  https://cloud.google.com/tasks
 
 Quick Start