[.github] Update issue template for bridge requests
[.github] Update issue template for bridge requests

* Automatically label bridge requests
* Propose default title for new bridge requests
RSS-Bridge/rss-bridge,sebsauvage/rss-bridge,kranack/rss-bridge,ORelio/rss-bridge,Riduidel/rss-bridge,ORelio/rss-bridge,Frenzie/rss-bridge,ORelio/rss-bridge,kranack/rss-bridge,Frenzie/rss-bridge,RSS-Bridge/rss-bridge,Riduidel/rss-bridge,Riduidel/rss-bridge,kranack/rss-bridge,kranack/rss-bridge,RSS-Bridge/rss-bridge