update cask token handling

[razvanazamfirei]

This changes the way we are handling the token. Currently, for casks including @, we see the following:

<tr>
        <td><a href="/cask/brave-browserbeta">brave-browserbeta</a></td>
        <td>1.66.90.0</td>
        <td>Web browser focusing on privacy</td>
        <td>Brave Beta</td>
</tr>

instead of:

<tr>
        <td><a href="/cask/brave-browser@beta">brave-browser@beta</a></td>
        <td>1.66.90.0</td>
        <td>Web browser focusing on privacy</td>
        <td>Brave Beta</td>
</tr>

[razvanazamfirei]

Thanks, @EricFromCanada! I made the changes.

[EricFromCanada]

Nice work @razvanazamfirei!

[MikeMcQuaid]

Thanks @razvanazamfirei and @EricFromCanada for review/merge!