Added check for 'HTTP/1.1 302 Found'

Before:

```bash
$ brew cask checklinks cloud-pull 
link check result for cloud-pull: failed
 - unexpected http response, expecting "HTTP/1.0 200 OK" or "HTTP/1.1 200 OK", got "HTTP/1.1 302 Found"
```

After:

```bash
$ brew cask checklinks cloud-pull 
link check result for cloud-pull: passed
```