CMake 3.21.0-rc3

Source/CMakeVersion.cmake

@@ -2,7 +2,7 @@
 set(CMake_VERSION_MAJOR 3)
 set(CMake_VERSION_MINOR 21)
 set(CMake_VERSION_PATCH 0)
-set(CMake_VERSION_RC 2)
+set(CMake_VERSION_RC 3)
 set(CMake_VERSION_IS_DIRTY 0)
 
 # Start with the full version number used in tags.  It has no dev info.