chore(deps): update dependency attrs to v25.3.0 (#1174)

Author: renovate-bot

samples/snippets/requirements-test.txt

@@ -1,4 +1,4 @@
-attrs==25.2.0
+attrs==25.3.0
 click==8.1.8
 google-auth==2.38.0
 google-cloud-testutils==1.6.0