You can add a redirect parameter to the shortcode:
[discourse_sso_client login='Login Through the Forum' redirect=https://wordpress.example.com/%D7%90%D7%90%D7%90%D7%90/]
That will create a link like this:
<a href="https://wordpress.example.com/?discourse_sso=1&redirect_to=https://wordpress.example.com/%D7%90%D7%90%D7%90%D7%90">Login Through the Forum</a>
You can also manually create a login link instead of using the shortcode. It needs to have the following query parameters:
?discourse_sso=1&redirect_to=https://example.com/your-wordpress-page