[doc] update brew instruction for doxygen

Author: Sjors

doc/developer-notes.md

@@ -193,7 +193,7 @@ Documentation can be generated with `make docs` and cleaned up with `make clean-
 
 Before running `make docs`, you will need to install dependencies `doxygen` and `dot`. For example, on macOS via Homebrew:
 ```
-brew install doxygen --with-graphviz
+brew install graphviz doxygen
 ```
 
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