feat(docs): Added Matix-Media as maintainer

Added `Matix-Media` as the maintainer for the German lexipack

lexipacks/readme.md

@@ -13,6 +13,7 @@ The people you need to bug about translation errors in a set lexipack. This will
 * Afrikaans [Hanro50](https://github.com/hanro50)
 * English [Hanro50](https://github.com/hanro50)
 * French [Txab](https://github.com/Txab33)
+* German [Matix-Media](https://github.com/Matix-Media)
 
 # Note
 The internal code of msmc should still be english. Mainly due to the maintainment nightmare it would be if we had 500 different languages represented in the code itself. This merely effects the output of msmc and you may be asked to switch to the default english lexipack when opening a support ticket in MCJS café.