Update CMakeLists.txt

Update CMakeLists to point to new libmexclass version to handle mac errors

Author: MWSestabro

CMakeLists.txt

@@ -121,7 +121,7 @@ set(LIBMEXCLASS_FETCH_CONTENT_NAME libmexclass)
 
 set(LIBMEXCLASS_FETCH_CONTENT_GIT_REPOSITORY "https://github.com/mathworks/libmexclass.git")
 
-set(LIBMEXCLASS_FETCH_CONTENT_GIT_TAG "bc2b9f2") 
+set(LIBMEXCLASS_FETCH_CONTENT_GIT_TAG "3a3b581") 
 
 set(LIBMEXCLASS_FETCH_CONTENT_SOURCE_SUBDIR "libmexclass/cpp")
 
@@ -546,3 +546,4 @@ install(FILES ${OPENTELEMETRY_PROXY_RUNTIME_LIBRARIES} DESTINATION ${LIBMEXCLASS
 if(WITH_EXAMPLES)
    add_subdirectory(examples)
 endif()
+