docs: new readme footer

README.md

@@ -99,6 +99,14 @@ and published in 2012. [Ryan’s writeup][writeup] on the subject is fantastic.
 [juckett]: https://www.ryanjuckett.com/
 [writeup]: https://www.ryanjuckett.com/damped-springs/
 
+## Feedback
+
+We’d love to hear your thoughts on this project. Feel free to drop us a note!
+
+* [Twitter](https://twitter.com/charmcli)
+* [The Fediverse](https://mastodon.social/@charmcli)
+* [Discord](https://charm.sh/chat)
+
 ## License
 
 [MIT](https://github.com/charmbracelet/harmonica/raw/master/LICENSE)
@@ -107,6 +115,6 @@ and published in 2012. [Ryan’s writeup][writeup] on the subject is fantastic.
 
 Part of [Charm](https://charm.sh).
 
-<a href="https://charm.sh/"><img alt="The Charm logo" src="https://stuff.charm.sh/charm-badge-unrounded.jpg" width="400"></a>
+<a href="https://charm.sh/"><img alt="The Charm logo" src="https://stuff.charm.sh/charm-badge.jpg" width="400"></a>
 
 Charm热爱开源 • Charm loves open source