deps: update dependency google-auth to v2.23.4 (#2217)

Author: renovate-bot

.kokoro/requirements.txt

@@ -129,9 +129,9 @@ google-api-core==2.12.0 \
     # via
     #   google-cloud-core
     #   google-cloud-storage
-google-auth==2.23.3 \
-    --hash=sha256:6864247895eea5d13b9c57c9e03abb49cb94ce2dc7c58e91cba3248c7477c9e3 \
-    --hash=sha256:a8f4608e65c244ead9e0538f181a96c6e11199ec114d41f1d7b1bffa96937bda
+google-auth==2.23.4 \
+    --hash=sha256:79905d6b1652187def79d491d6e23d0cbb3a21d3c7ba0dbaa9c8a01906b13ff3 \
+    --hash=sha256:d4bbc92fe4b8bfd2f3e8d88e5ba7085935da208ee38a134fc280e7ce682a05f2
     # via
     #   gcp-releasetool
     #   google-api-core