[SYCL][NFC] Update status of SYCL_INTEL_local_memory extension (#4323)

Author: sergey-semenov

sycl/doc/extensions/README.md

@@ -27,7 +27,7 @@ DPC++ extensions status:
 | [SYCL_INTEL_reqd_work_group_size](ReqdWorkGroupSize/SYCL_INTEL_reqd_work_group_size.asciidoc)                               | Supported(OpenCL: CPU, GPU)               | |
 | [SPV_INTEL_function_pointers](SPIRV/SPV_INTEL_function_pointers.asciidoc)                                                   | Supported(OpenCL: CPU, GPU; HOST)         | |
 | [SPV_INTEL_inline_assembly](SPIRV/SPV_INTEL_inline_assembly.asciidoc)                                                       | Supported(OpenCL: GPU)                    | |
-| [LocalMemory](LocalMemory/LocalMemory.asciidoc)                                                                             | Proposal                                  | |
+| [LocalMemory](LocalMemory/LocalMemory.asciidoc)                                                                             | Supported(OpenCL; CUDA)                   | Revision 1 of the spec is fully supported, future revisions are expected to expand the functionality |
 | [SYCL_INTEL_static_local_memory_query](StaticLocalMemoryQuery/SYCL_INTEL_static_local_memory_query.asciidoc)                | Proposal                                  | |
 | [SYCL_INTEL_sub_group_algorithms](SubGroupAlgorithms/SYCL_INTEL_sub_group_algorithms.asciidoc)                              | Partially supported(OpenCL: CPU, GPU)     | Features from SYCL_INTEL_group_algorithms extended to sub-groups |
 | [Sub-groups for NDRange Parallelism](SubGroupNDRange/SubGroupNDRange.md)                                                    | Deprecated(OpenCL: CPU, GPU)              | |