📝 building.md: BINARY_RELEASE -> CMAKE_BUILD_TYPE

Use the standard option

[ci skip]

docs/building.md

@@ -329,7 +329,7 @@ select Icons -> Information in the top menu.
 <details><summary><b>CMake build options</b></summary>
 
 ### General
-- `-DBINARY_RELEASE=ON` changed build type to release and optimize for distribution.
+- `-DCMAKE_BUILD_TYPE=Release` changed build type to release and optimize for distribution.
 - `-DNONET=ON` disable network support, this also removes the need for the ASIO and Sodium.
 - `-DUSE_SDL1=ON` build for SDL v1 instead of v2, not all features are supported under SDL v1, notably upscaling.
 - `-DCMAKE_TOOLCHAIN_FILE=../CMake/32bit.cmake` generate 32bit builds on 64bit platforms (remember to use the `linux32` command if on Linux).