fix(docker-image): update collabora/code docker tag to v23.05.6.3.1

| datasource | package        | from        | to          |
| ---------- | -------------- | ----------- | ----------- |
| docker     | collabora/code | 23.05.5.4.1 | 23.05.6.3.1 |

apps/default/nextcloud/release-collabora.yaml

@@ -17,7 +17,7 @@ spec:
  values:
  image:
  repository: collabora/code
- tag: 23.05.5.4.1
+ tag: 23.05.6.3.1
 
  env:
  extra_params: --o:ssl.termination=true --o:ssl.enable=false