chore(dev): Downgrade PostgreSQL minor version to match Azure (#1536)

<!--- Provide a general summary of your changes in the Title above -->

## Description

<!--- Describe your changes in detail -->

## Related Issue(s)

- #1520 

## Verification

- [ ] **Your** code builds clean without any errors or warnings
- [ ] Manual testing done (required)
- [ ] Relevant automated test added (if you find this hard, leave it and
we'll help out)

## Documentation

- [ ] Documentation is updated (either in `docs`-directory, Altinnpedia
or a separate linked PR in
[altinn-studio-docs.](https://github.com/Altinn/altinn-studio-docs), if
applicable)

docker-compose-db-redis.yml

@@ -2,7 +2,7 @@ version: '3.9'
 
 services:
   dialogporten-postgres:
-    image: postgres:16.4
+    image: postgres:16.3
     restart: always
     command: postgres -c wal_level=logical
     environment:

tests/Digdir.Domain.Dialogporten.Application.Integration.Tests/Common/DialogApplication.cs

@@ -40,7 +40,7 @@ public class DialogApplication : IAsyncLifetime
     private ServiceProvider _rootProvider = null!;
     private ServiceProvider _fixtureRootProvider = null!;
     private readonly PostgreSqlContainer _dbContainer = new PostgreSqlBuilder()
-        .WithImage("postgres:16.4")
+        .WithImage("postgres:16.3")
         .Build();
 
     public async Task InitializeAsync()