[CI] Update sycl-rel-nightly.yml (#16378)

Surprisingly env is not accessible everywhere. Replacing it by hardcoded
branch name.

Author: KornevNikita

.github/workflows/sycl-rel-nightly.yml

@@ -7,12 +7,6 @@ on:
 
 permissions: read-all
 
-env:
-  # NOTE: so that GitHub Actions can trigger the scheduled workflow run - the
-  # workflow file should be on the default branch. Therefore every job should
-  # checkout the release branch.
-  SYCL_REL_BRANCH: "draft-sycl-rel-6_0_0"
-
 jobs:
   # To avoid unnecessary scheduled runs this job checks if there are new commits
   # since the last run. More precisely, it checks if the last commit is older
@@ -25,7 +19,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
       with:
-        ref: ${{ env.SYCL_REL_BRANCH }}
+        ref: draft-sycl-rel-6_0_0
     - run: git show --quiet | tee -a $GITHUB_STEP_SUMMARY
 
     - id: is_new_commit
@@ -45,7 +39,7 @@ jobs:
       build_artifact_suffix: v6
       build_configure_extra_args: '--hip --cuda'
       merge_ref: ''
-      ref: ${{ env.SYCL_REL_BRANCH }}
+      ref: draft-sycl-rel-6_0_0
 
       # We upload the build for people to download/use, override its name and
       # prefer widespread gzip compression.
@@ -113,7 +107,7 @@ jobs:
       tests_selector: ${{ matrix.tests_selector }}
       extra_lit_opts: ${{ matrix.extra_lit_opts }}
       reset_intel_gpu: ${{ matrix.reset_intel_gpu }}
-      ref: ${{ env.SYCL_REL_BRANCH }}
+      ref: draft-sycl-rel-6_0_0
       merge_ref: ''
       sycl_toolchain_artifact: sycl_linux_default
       sycl_toolchain_archive: ${{ needs.ubuntu2204_build.outputs.artifact_archive_name }}
@@ -127,7 +121,7 @@ jobs:
       # We upload both Linux/Windows build via Github's "Releases"
       # functionality, make sure Linux/Windows names follow the same pattern.
       artifact_archive_name: sycl_windows.tar.gz
-      build_ref: ${{ env.SYCL_REL_BRANCH }}
+      build_ref: draft-sycl-rel-6_0_0
 
   e2e-win:
     needs: build-win
@@ -142,7 +136,7 @@ jobs:
       runner: '["Windows","gen12"]'
       sycl_toolchain_archive: ${{ needs.build-win.outputs.artifact_archive_name }}
       extra_lit_opts: --param gpu-intel-gen12=True
-      ref: ${{ env.SYCL_REL_BRANCH }}
+      ref: draft-sycl-rel-6_0_0
 
   cuda-aws-start:
     needs: [ubuntu2204_build]
@@ -151,7 +145,7 @@ jobs:
     secrets: inherit
     with:
       mode: start
-      ref: ${{ env.SYCL_REL_BRANCH }}
+      ref: draft-sycl-rel-6_0_0
 
   cuda-run-tests:
     needs: [ubuntu2204_build, cuda-aws-start]
@@ -163,7 +157,7 @@ jobs:
       image: ghcr.io/intel/llvm/ubuntu2204_build:latest-0300ac924620a51f76c4929794637b82790f12ab
       image_options: -u 1001 --gpus all --cap-add SYS_ADMIN --env NVIDIA_DISABLE_REQUIRE=1
       target_devices: ext_oneapi_cuda:gpu
-      ref: ${{ env.SYCL_REL_BRANCH }}
+      ref: draft-sycl-rel-6_0_0
       merge_ref: ''
 
       sycl_toolchain_artifact: sycl_linux_default
@@ -177,4 +171,4 @@ jobs:
     secrets: inherit
     with:
       mode: stop
-      ref: ${{ env.SYCL_REL_BRANCH }}
+      ref: draft-sycl-rel-6_0_0