build: release script update (#13185)

Towards b/374118150

Author: parthea

.kokoro/release-single.sh

@@ -21,7 +21,7 @@ set -eo pipefail
 pwd
 
 # Move into the package, build the distribution and upload.
-TWINE_PASSWORD=$(cat "${KOKORO_KEYSTORE_DIR}/73713_google-cloud-pypi-token-keystore-2")
+TWINE_PASSWORD=$(cat "${KOKORO_KEYSTORE_DIR}/73713_google-cloud-pypi-token-keystore-3")
 
 python3 setup.py sdist bdist_wheel
 twine upload --username __token__ --password "${TWINE_PASSWORD}" dist/*

.kokoro/release/common.cfg

@@ -28,7 +28,7 @@ before_action {
   fetch_keystore {
     keystore_resource {
       keystore_config_id: 73713
-      keyname: "google-cloud-pypi-token-keystore-2"
+      keyname: "google-cloud-pypi-token-keystore-3"
     }
   }
 }