chore(deps): update google/cloud-sdk:446.0.1-slim docker digest to af91e39

Author: renovate[bot]

.circleci/config.yml

@@ -569,7 +569,7 @@ jobs:
             - release_tag
   release:
     docker:
-      - image: google/cloud-sdk:446.0.1-slim@sha256:3eb93a18c18e57955ad08095245f4db36cfca398fbb4d83622a24cf6fb5bee38
+      - image: google/cloud-sdk:446.0.1-slim@sha256:af91e392a940f98d7c44262ebe9b75784bb1edab2dc141fe31c7caa51511f81e
     steps:
       - attach_workspace:
           at: .