message: correct tup install instructions on macOS
diff: @@ -74,7 +74,7 @@ To compile the program, you first need to install the prerequisite tools:
  #### Mac:
  * `brew cask install gcc-arm-embedded`: GCC toolchain+debugger
  -* `brew tap homebrew/fuse; brew install homebrew/fuse/tup`: Build tool
  +* `brew cask install osxfuse; brew install tup`: Build tool
  * `brew install openocd`: Programmer
  #### Windows:
  