Comment update for newly discovered failure after 'single_task()' enabled

Author: dongkyunahn-intel

SYCL/ESIMD/api/esimd_pack_unpack_mask.cpp

@@ -7,7 +7,7 @@
 //===----------------------------------------------------------------------===//
 // REQUIRES: gpu
 // UNSUPPORTED: cuda || hip
-// TODO: esimd_emulator fails due to unimplemented 'single_task()' method
+// TODO: esimd_emulator fails with mismatches similar to OpenCL
 // XFAIL: esimd_emulator
 // TODO: fails on OpenCL - https://github.com/intel/llvm-test-suite/issues/901
 // UNSUPPORTED: opencl