chore(deps): update dependency google-cloud-storage to v2.6.0 (#467)

Co-authored-by: Anthonios Partheniou <partheniou@google.com>

Author: renovate-bot

google-cloud-speech/samples/snippets/requirements.txt

@@ -1,2 +1,2 @@
 google-cloud-speech==2.16.2
-google-cloud-storage==2.5.0
+google-cloud-storage==2.6.0