Set timeout to explicit 0 in gogs.js (#7890)

## Describe the pull request

A simple fix in public/js/gogs.js making bug upload not result in a
timeout (added just one line)

Link to the issue: closes https://github.com/gogs/gogs/issues/6149

## Test plan

- Set the max_size of `attachment` to a high number

```toml
[release.attachment]
ENABLED          = true
ALLOWED_TYPES    = */*
MAX_SIZE         = 512
MAX_FILES        = 20
```

- Upload a file to releases


![image](https://github.com/user-attachments/assets/8cf29c73-c8ec-42a3-9660-681a583b577a)

It doesn't randomly timeout!

public/js/gogs.js

@@ -1474,6 +1474,7 @@ $(document).ready(function() {
       headers: { "X-CSRF-Token": csrf },
       maxFiles: $dropzone.data("max-file"),
       maxFilesize: $dropzone.data("max-size"),
+      timeout: 0,
       acceptedFiles:
         $dropzone.data("accepts") === "*/*" ? null : $dropzone.data("accepts"),
       addRemoveLinks: true,