chore(deps): update postgres:18.4-alpine docker digest to 96d56f7 (#3792)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/test.yml

@@ -8,7 +8,7 @@ jobs:
   test:
     services:
       postgres:
-        image: postgres:18.4-alpine@sha256:38346350acb3e824c6948e6df7ff4759f48ba09d8ef4cb8d1b6e6db120f56872
+        image: postgres:18.4-alpine@sha256:96d56f7f57c6aacd1fcb908bc83b345ec5f83231ee486dd66a1baadce274db88
         ports:
         - 5432:5432
         # needed because the postgres container does not provide a healthcheck