chore(deps): update postgres:18.0-alpine docker digest to 48c8ad3

Author: renovate[bot]

.github/workflows/test.yml

@@ -20,7 +20,7 @@ jobs:
         ports:
         - 6379:6379
       postgres:
-        image: postgres:18.0-alpine@sha256:0ce0d1fa5bf54b7b338e09829ab76b479dbd0702da50bf0cdf5c258208e47f40
+        image: postgres:18.0-alpine@sha256:48c8ad3a7284b82be4482a52076d47d879fd6fb084a1cbfccbd551f9331b0e40
         ports:
         - 5432:5432
         # needed because the postgres container does not provide a healthcheck