add link to GH discussions & remove flattr integration
<h2>Help</h2>
<p>
Join <code>#isso</code> on <a href="https://libera.chat/">Libera.Chat</a>
- or open an issue on <a href="https://github.com/posativ/isso/issues">GitHub</a>.
+ or open an issue on <a href="https://github.com/posativ/isso/discussions">GitHub</a>.
</p>
<h2>Contribute</h2>
<p>
- <a href="{{ pathto('contribute') }}">Write Code</a>,
- <a href="https://www.transifex.com/projects/p/isso/">Translate</a> or
- <a href="https://flattr.com/thing/2059355/posativisso-on-GitHub">Flattr
- <img src="{{ pathto('_static/flattr.png', 1) }}" alt="Flattr icon"/></a>.
+ <a href="{{ pathto('contribute') }}">Write Code</a> or
+ <a href="https://www.transifex.com/projects/p/isso/">Translate</a>
</p>
{% include "searchbox.html" %}
