fix: typo in sample file name (GoogleCloudPlatform#12676)

* fix typo in sample file name

* update test file

* refresh CI checks

Author: Valeriy-Burlaka

…i/context_caching/list_content_caches.py …i/context_caching/list_context_caches.pygenerative_ai/context_caching/list_content_caches.py renamed to generative_ai/context_caching/list_context_caches.py generative_ai/context_caching/list_content_caches.py renamed to generative_ai/context_caching/list_context_caches.py

@@ -19,7 +19,7 @@
 import create_context_cache
 import delete_context_cache
 import get_context_cache
-import list_content_caches
+import list_context_caches
 import pytest
 import update_context_cache
 import use_context_cache
@@ -50,7 +50,7 @@ def test_get_context_cache(cache_id: str) -> None:
 
 
 def test_get_list_of_context_caches(cache_id: str) -> None:
-    response = list_content_caches.list_content_caches()
+    response = list_context_caches.list_content_caches()
     assert cache_id in response