Update cimg/base Docker tag to v2023.05

Author: renovate[bot]

.circleci/config.yml

@@ -83,7 +83,7 @@ jobs:
   build_docker:
     resource_class: small
     docker:
-      - image: cimg/base:2023.04
+      - image: cimg/base:2023.05
     steps:
       - checkout
       - setup_remote_docker:
@@ -96,7 +96,7 @@ jobs:
   publish_docker:
     resource_class: small
     docker:
-      - image: cimg/base:2023.04
+      - image: cimg/base:2023.05
     steps:
       - checkout
       - setup_remote_docker: