docs: add a contact section with a link to Matrix

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Added
+
+- Add link to the Matrix room in the README (@MightyCreak)
+
 ## 0.8.1 - 2023-04-07
 
 ### Changed

README.md

@@ -1,5 +1,9 @@
 <h1 align="center">
-  <img src="data/icons/hicolor/scalable/apps/io.github.mightycreak.Diffuse.svg" alt="Diffuse" width="192" height="192"/><br/>
+  <img
+    src="./data/icons/hicolor/scalable/apps/io.github.mightycreak.Diffuse.svg"
+    alt="Diffuse"
+    width="192"
+    height="192"/><br/>
 </h1>
 
 <p align="center" style="margin-top: 2em">
@@ -10,7 +14,9 @@
 
 <p align="center">
   <a href="https://github.com/MightyCreak/diffuse/actions/workflows/ci.yml">
-    <img src="https://github.com/MightyCreak/diffuse/actions/workflows/ci.yml/badge.svg" alt="CI status"/>
+    <img
+      src="https://github.com/MightyCreak/diffuse/actions/workflows/ci.yml/badge.svg"
+      alt="CI status"/>
   </a>
   <a href="https://repology.org/project/diffuse/versions">
     <img src="https://repology.org/badge/tiny-repos/diffuse.svg" alt="Packaging status">
@@ -51,6 +57,10 @@ Some key features of Diffuse:
 For a more detailed documentation for users, translators and developers, see
 the [documentation](docs/).
 
+## Contact
+
+Discuss with us on Matrix at [#diffuse:matrix.org](https://matrix.to/#/#diffuse:matrix.org).
+
 ## Licenses
 
 Diffuse is under the [GPLv2](COPYING).