[UR] Update UR SHA to change unions to std::variant (#11539)

Update UR SHA to oneapi-src/unified-runtime#961
change unions to std::variant in the HIP and CUDA adapters.

---------

Co-authored-by: Kenneth Benzie (Benie) <k.benzie83@gmail.com>

sycl/plugins/unified_runtime/CMakeLists.txt

@@ -54,13 +54,13 @@ if(SYCL_PI_UR_USE_FETCH_CONTENT)
  include(FetchContent)
 
  set(UNIFIED_RUNTIME_REPO "https://github.com/oneapi-src/unified-runtime.git")
- # commit: 7c8617b3710736db642585fe310a64e19e059d2e
- # Merge:  20d4f49 9a13af
+ # commit 036b9cfcd8fb4be9394449b5406e6402580a63c9
+ # Merge: 2ab0734 86f96f0
  # Author: Kenneth Benzie (Benie) <k.benzie@codeplay.com>
- # Date: Thu Oct 26 10:20:03 2023 +0100
- #  Merge pull request #965 from Bensuo/ewan/L0_internal_event_fix
- #  [Command-buffer][L0] Reset sync-point events
- set(UNIFIED_RUNTIME_TAG 7c8617b3710736db642585fe310a64e19e059d2e)
+ # Date: Fri Oct 27 16:36:23 2023 +0100
+ # Merge pull request #961 from hdelan/change-unions-to-stdvariant
+ # [HIP][CUDA] Change unions in ur_mem_handle_t_ to stdvariant
+ set(UNIFIED_RUNTIME_TAG 036b9cfcd8fb4be9394449b5406e6402580a63c9)
 
  if(SYCL_PI_UR_OVERRIDE_FETCH_CONTENT_REPO)
  set(UNIFIED_RUNTIME_REPO "${SYCL_PI_UR_OVERRIDE_FETCH_CONTENT_REPO}")