Port is missing when port-forwarding via Dashboard

Environment variables:
```dotenv
CODER_ACCESS_URL=http://coder.example.com:3000
CODER_HTTP_ADDRESS=0.0.0.0:3000
CODER_WILDCARD_ACCESS_URL=*.coder.example.com
```
The URL should be 
```diff
+http://3000--main--jizu--jizu.example.com:3000
-http://3000--main--jizu--jizu.example.com
```
![image](https://github.com/coder/coder/assets/4011348/80c4966a-2b05-40d5-bc30-783fcc5a5e46)
