Update name of the artifact to be similar to package name

Author: miry

.github/workflows/llvm.yml

@@ -45,8 +45,14 @@ jobs:
       - name: Build
         run: bundle exec omnibus build llvm --log-level debug --override use_git_caching:false
 
-      - uses: actions/upload-artifact@v3
+      - name: Extract package name to build a build artifact name
+        run: |
+          filename=$(ls -1 pkg/llvm-*.tar.gz)
+          echo "BUILD_NAME=${filename%.*}" >> "$GITHUB_ENV"
+
+      - uses: actions/upload-artifact@v4
         with:
-          name: llvm-archive
+          name: ${{ env.BUILD_NAME }}
           path: omnibus/pkg/*.tar.gz
           retention-days: 1
+          if-no-files-found: error