[clang-repl] Update FIXME based on feedback from @zero9178.

See #67586.

Author: lhames

clang/unittests/Interpreter/ExceptionTests/InterpreterExceptionTest.cpp

@@ -30,7 +30,7 @@
 #include "gtest/gtest.h"
 
 // Disable LSan for this test.
-// FIXME: Re-enable this once we track down the leak described in
+// FIXME: Re-enable once we can assume GCC 13.2 or higher.
 // https://llvm.org/github.com/llvm/llvm-project/issues/67586.
 #if LLVM_ADDRESS_SANITIZER_BUILD || LLVM_HWADDRESS_SANITIZER_BUILD
 #include <sanitizer/lsan_interface.h>