chore(deps): update postgres:18 docker digest to 38d5c9d

Author: renovate[bot]

compose.yml

@@ -32,7 +32,7 @@ services:
       - user_uploads:/opt/relab/backend/data/uploads
 
   database:
-    image: postgres:18@sha256:5ec39c188013123927f30a006987c6b0e20f3ef2b54b140dfa96dac6844d883f
+    image: postgres:18@sha256:38d5c9d522037d8bf0864c9068e4df2f8a60127c6489ab06f98fdeda535560f9
     env_file: ./backend/.env
     healthcheck:
       test: # Check if the database is ready to accept connections