docs(#359): reframe Discord donation as community-requested, not solicited

Owner's call: 'a few of you asked how to chip in, so I put up a page'
reads as responsive/humble and implies traction, vs. asking for money.
Community-request framing fits Discord (talking to the folks who asked);
release-notes donation line stays broader-audience.

Part of #160. Agent: SapphireCompass (session 8d755b5e)

discord/1.2.0.md

@@ -17,4 +17,4 @@ A ground-up interface redesign, a real database under the hood, GIFs that work a
 🔗 Project home: https://offband.org
 📝 Full changelog is in the release notes at the link above.
 
-❤️ **Offband is free and open source, built by a tiny team.** If it's useful to you, you can help keep it going, and help fund getting it onto the iOS App Store, at https://offband.org/donate. Thank you for being part of it.
+❤️ **A few of you have asked how to chip in, so I've put up a donation page:** https://offband.org/donate. Offband is free and open source and always will be. Anything there just helps keep the project going, and helps cover getting it onto the iOS App Store. Thank you all for being part of this.