CODECONVENTIONS: Fix brew uncrustify installation instructions.

For security reasons, homebrew stopped allowing direct Formula references.

Signed-off-by: Brian Pugh <[email protected]>

Author: BrianPugh

CODECONVENTIONS.md

@@ -102,7 +102,7 @@ Brew
 This command may work, please raise a new Issue if it doesn't:
 
 ```
-brew install https://github.com/Homebrew/homebrew-core/raw/2b07d8192623365078a8b855a164ebcdf81494a6/Formula/uncrustify.rb
+curl -L https://github.com/Homebrew/homebrew-core/raw/2b07d8192623365078a8b855a164ebcdf81494a6/Formula/uncrustify.rb > uncrustify.rb && brew install uncrustify.rb && rm uncrustify.rb
 ```
 
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