Update README.md CMake link and instructions

Signed-off-by: Mike Chang <[email protected]>

README.md

@@ -42,7 +42,7 @@ For the latest details and system requirements, refer to [System Requirements](h
         *   Game Development with C++
         *   MSVC v142 - VS 2019 C++ x64/x86
         *   C++ 2019 redistributable update
-*   CMake 3.20.5 minimum: [https://cmake.org/download/](https://cmake.org/download/)
+*   CMake 3.20.5 minimum: [https://cmake.org/download/#latest](https://cmake.org/download/#latest) (Release Candidate versions are not supported)
 
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