Add compatibility check badges to READMEs. (#8288)

packages/google-cloud-webrisk/README.rst

@@ -1,15 +1,21 @@
 Python Client for Web Risk API (`Alpha`_)
 =========================================
 
+|compat_check_pypi| |compat_check_github|
+
 **Note:** Cloud Web Risk is not yet publicly available. You must be whitelisted in order to gain access. See `Setting up the Web Risk API`_ in the product documentation for a link to the sign-up form.
 
-.. _Setting up the Web Risk API: 
+.. _Setting up the Web Risk API:
 
 `Web Risk API`: https://cloud.google.com/web-risk/docs/quickstart
 
 - `Client Library Documentation`_
 - `Product Documentation`_
 
+.. |compat_check_pypi| image:: https://python-compatibility-tools.appspot.com/one_badge_image?package=google-cloud-webrisk
+   :target: https://python-compatibility-tools.appspot.com/one_badge_target?package=google-cloud-webrisk
+.. |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%3Dwebrisk
+   :target: https://python-compatibility-tools.appspot.com/one_badge_target?package=git%2Bgit%3A//github.com/googleapis/google-cloud-python.git%23subdirectory%3Dwebrisk
 .. _Alpha: https://github.com/googleapis/google-cloud-python/blob/master/README.rst
 .. _Web Risk API: https://cloud.google.com/webrisk
 .. _Client Library Documentation: https://googleapis.github.io/google-cloud-python/latest/webrisk/usage.html