message: add notes for llvm
diff: @@ -24,13 +24,14 @@ to native speeds.
  ## Requirements
  The LLVM compiler requires a valid installation of LLVM in your system.
  -It currently requires **LLVM 10**.
  +It currently requires **LLVM 11**.
  You can install LLVM easily on your Debian-like system via this command:
  ```bash
  -bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)"
  +wget https://apt.llvm.org/llvm.sh -O /tmp/llvm.sh
  +sudo bash /tmp/llvm.sh 11
  ```
  Or in macOS:
  