Simplify ESIMD ownership syntax

Co-authored-by: Alexey Bader <[email protected]>

Author: Artem Gindinson

.github/CODEOWNERS

@@ -48,7 +48,7 @@ llvm/ @intel/dpcpp-tools-reviewers
 clang/tools/clang-offload-*/ @intel/dpcpp-tools-reviewers
 
 # Explicit SIMD
-SYCLLowerIR/ESIMD @intel/dpcpp-esimd-reviewers
+ESIMD/ @intel/dpcpp-esimd-reviewers
 esimd/ @intel/dpcpp-esimd-reviewers
 sycl/include/sycl/ext/intel/experimental/esimd.hpp @intel/dpcpp-esimd-reviewers
 sycl/doc/extensions/ExplicitSIMD/ @intel/dpcpp-esimd-reviewers