Add note about Mutexes on DSP thread

Author: exa04

README.md

@@ -1,3 +1,6 @@
+> [!NOTE]
+> To use Cyma 0.1.0, you often need Mutexes, which can lead to **priority inversion** and **syscalls** on the audio thread. I'm working on a new (most likely MPMC channel/queue-based) system to adress this. It'll be part of Cyma 0.2.0
+
 <div align="center">
   <img src="doc/logo.svg">
   <h1>Cyma</h1>