matrix: mention tune-your-chat

pages/matrix.markdown

@@ -83,11 +83,8 @@ _Note that this section is manually updated and might be missing some links._
 
 ### Where else can I read about Matrix?
 
-- [Miki is the Matrix wiki](https://en.miki.community/) where I will attempt to
-  contribute to.
 - [Matrix.org](https://matrix.org/) is the official website.
 - [My gist repository also has notes on Matrix, mostly /devtools related ones](https://gitea.blesmrt.net/mikaela/gist/src/branch/master/matrix),
-  they predate Miki and I hope to sort more relevant or historical parts there.
   - PPFI also has
     [a couple of Matrix files](https://git.piraattipuolue.fi/Pikaviestimet/Pikaviestimet/src/branch/master/matrix),
     ([GitHub mirror](https://github.com/piraattipuolue/pikaviestimet)).
@@ -101,6 +98,8 @@ _Note that this section is manually updated and might be missing some links._
 - Cos has written
   [Matrix tips they don't tell you](https://wordsmith.social/cos/matrix-tips-they-dont-tell-you)
   containing a FAQ, hints and guides.
+- [Tune Your Chat](https://tune-your-chat.github.io/ecosystem/tune/) has a
+  similar collection of hints to this section.
 
 ### Is there any kind of Matrix etiquette I should know about?