chore(deps): update postgres docker tag to v16.2 (#3461)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| postgres | minor | `16.1-alpine` -> `16.2-alpine` |

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docker-compose.gitpod.yaml

@@ -3,7 +3,7 @@ version: '3'
 
 services:
   gitea-database:
-    image: postgres:16.1-alpine
+    image: postgres:16.2-alpine
     environment:
       POSTGRES_USER: gitea
       POSTGRES_PASSWORD: 123456