- fix llvm version

--- CMakeLists.txt.orig	2024-06-13 17:20:31 UTC
+++ CMakeLists.txt
@@ -156,7 +156,7 @@ include(GNUInstallDirs)
 #
 # https://github.com/llvm/llvm-project/issues/58558
 include(GNUInstallDirs)
-find_package(LLVM REQUIRED CONFIG)
+find_package(LLVM ${FREEBSD_LLVM_VERSION} REQUIRED CONFIG)
 
 if(${LLVM_VERSION_MAJOR} LESS 13 OR ${LLVM_VERSION_MAJOR} GREATER 18)
   message(FATAL_ERROR "LLVM >= 13 and <= 18 is required.")