chore: fix Storage replacements to prepare for removing overrides

Author: jskeet

.librarian/generator-input/client-post-processing/storage-integration.yaml

@@ -287,10 +287,10 @@ replacements:
       packages/google-cloud-storage/README.rst,
     ]
     before: |
-      Python Client for Google Cloud Storage
+      Python Client for Cloud Storage
       [\s\S]*?\(This is the reason for 2.i. above.\)
     after: |
-      Python Client for Google Cloud Storage
+      Python Client for Cloud Storage
       ======================================
 
       |stable| |pypi| |versions|