update build instructions

Author: NikolasK-source

README.md

@@ -7,7 +7,7 @@ Modbus tcp client that stores its data (registers) in shared memory objects.
 git submodule init
 mkdir build
 cd build
-cmake .. -DCMAKE_CXX_COMPILER=$(which clang++) -DCMAKE_BUILD_TYPE=Release
+cmake .. -DCMAKE_CXX_COMPILER=$(which clang++) -DCMAKE_BUILD_TYPE=Release -DCLANG_FORMAT=OFF
 cmake -build . 
 ```