[SYCL][Graph] UR command-buffer spec improvements

Bump UR tag to
[Improve specification of command-buffer update errors](oneapi-src/unified-runtime#2462)

Author: EwanC

sycl/cmake/modules/FetchUnifiedRuntime.cmake

@@ -116,7 +116,7 @@ if(SYCL_UR_USE_FETCH_CONTENT)
       CACHE PATH "Path to external '${name}' adapter source dir" FORCE)
   endfunction()
 
-  set(UNIFIED_RUNTIME_REPO "https://github.com/oneapi-src/unified-runtime.git")
+  set(UNIFIED_RUNTIME_REPO "https://github.com/Bensuo/unified-runtime.git")
   include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules/UnifiedRuntimeTag.cmake)
 
   set(UMF_BUILD_EXAMPLES OFF CACHE INTERNAL "EXAMPLES")

sycl/cmake/modules/UnifiedRuntimeTag.cmake

@@ -4,4 +4,4 @@
 # Date:   Mon Dec 16 13:53:13 2024 +0000
 #     Merge pull request #2467 from nrspruit/fix_external_import_function_call
 #     [L0] Fix external semaphore import function calls to match the header
-set(UNIFIED_RUNTIME_TAG 39df0317814c164f5242eda8d6f08550f6268492)
+set(UNIFIED_RUNTIME_TAG "cmd-buf_update_errors")