[Bug]: Compile error on Windows CLion, using MinGW toolchains

[iamtangxin]

Describe the issue

when I build protobuf on windows with CLion, i got the error 'cannot find -lrt' while linking protoc.exe, we should not link librt on Windows, right? finally i found a typo in absl/base/CMakeLists.txt:230 $<$<BOOL:${LIBRT}>:-lrt> which should be $<$<BOOL:${LIBRT_FOUND}>:-lrt>

Steps to reproduce the problem

cmake build args: -Dprotobuf_BUILD_SHARED_LIBS=OFF -Dprotobuf_BUILD_TESTS=OFF -Dprotobuf_BUILD_CONFORMANCE=OFF

What version of Abseil are you using?

master

What operating system and version are you using?

Windows 10

What compiler and version are you using?

MinGW gcc version 11.2.0

What build system are you using?

CMake 3.26.4

Additional context

No response