👷 Upgrade postgres:latest Docker digest to 9a1c386

Author: renovate[bot]

Auto-Devops/Ruby.gitlab-ci.yml

@@ -58,7 +58,7 @@ variables:
     - .install_cache
   stage: test
   services:
-    - postgres:latest@sha256:6b841c8f6a819884207402f1209a8116844365df15fca8cf556fc54a24c70800
+    - postgres:latest@sha256:9a1c386e871cb6eef991770d65e37e6d278976bdecdeda9ce631b79e8c461cfd
     - redis:latest@sha256:1d38c52e8d34c0471350c545d7a9066c95f5a6b9f24c74209331c03c496e2290
   variables:
     RAILS_ENV: test