Parse version from GitHub tag name instead of release name (#7423)

If we not change this, some release will parse error.

https://docs.github.com/en/rest/releases/releases?apiVersion=2022-11-28

```json
{
  "name": {
    "type": [
      "string",
      "null"
    ]
  }
}
```

<img width="1188" alt="image"
src="https://github.com/zed-industries/zed/assets/5518/bd53dbc4-ae2c-4f19-afd7-58e70b4f87d8">

---------

Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>