chore(CONTRIBUTING): Fix Redis URL scheme (#843)

rwhogg · parthea · web-flow · commit 8f62c0a563de · 2022-11-26T16:00:11.000-08:00
redis://, rediss://, and unix:// are the only
supported URL schemes, although not every version
of the Python Redis client enforces this.

Co-authored-by: Anthonios Partheniou &lt;partheniou@google.com&gt;
diff --git a/packages/google-cloud-ndb/CONTRIBUTING.rst b/packages/google-cloud-ndb/CONTRIBUTING.rst
@@ -81,7 +81,7 @@ We use `nox <https://nox.readthedocs.io/en/latest/>`__ to instrument our tests.
 - To run unit tests that use Memcached or Redis, you must have them running and set the appropriate environment variables:
 
     $ export MEMCACHED_HOSTS=localhost:11211
-    $ export REDIS_CACHE_URL=http://localhost:6379
+    $ export REDIS_CACHE_URL=redis://localhost:6379
 
 
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