chore(deps): update postgres:18.1-alpine docker digest to eca6fb2 (#3248)

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

Author: renovate[bot]

.github/workflows/test.yml

@@ -6,7 +6,7 @@ jobs:
   test:
     services:
       postgres:
-        image: postgres:18.1-alpine@sha256:61edb38e51d3542d590b964d40ca6526c3317a37c69751e92d7011d2e0cef897
+        image: postgres:18.1-alpine@sha256:eca6fb2d91fda290eb8cfb8ba53dd0dcbf3508a08011e30adb039ea7c8e1e9f2
         ports:
         - 5432:5432
         # needed because the postgres container does not provide a healthcheck