Update CODEOWNERS and limit fetch depth

Author: aelovikov-intel

.github/CODEOWNERS

@@ -226,4 +226,4 @@ sycl/test-e2e/ThreadSanitizer/ @intel/dpcpp-sanitizers-review
 
 # ABI compatibility
 devops/compat_ci_exclude.sycl-rel-** @gmlueck @xtian-github
-sycl/test/abi/*sycl-rel*.dump @gmlueck @xtian-github
+sycl/test/abi/*sycl-rel*.dump @AlexeySachkov @KornevNikita

.github/workflows/sycl-nightly.yml

@@ -19,7 +19,7 @@ jobs:
         sparse-checkout: |
           sycl/test/abi
     - run: |
-        git fetch origin sycl-rel-6_3
+        git fetch --depth=1 origin sycl-rel-6_3
         git diff --exit-code -I "^# RUN" origin/sycl-rel-6_3:sycl/test/abi/sycl_symbols_linux.dump sycl/test/abi/sycl_symbols_linux-sycl-rel-6_3.dump
         git diff --exit-code -I "^# RUN" origin/sycl-rel-6_3:sycl/test/abi/sycl_symbols_windows.dump sycl/test/abi/sycl_symbols_windows-sycl-rel-6_3.dump