Fix repo case

Author: Apsu

.github/workflows/build-vllm.yaml

@@ -2,7 +2,6 @@ name: Build vLLM Docker Image Matrix
 
 env:
   PARALLELISM: 2
-  GHCR_IMAGE: ghcr.io/${{ github.repository }}
   TRITON_REF: release/3.3.x
   TRITON_BUILD_VERSION: 3.3.0
   XFORMERS_REF: v0.0.29.post3
@@ -26,8 +25,9 @@ jobs:
         image_distro: [ubuntu24.04]
     runs-on: [self-hosted, "${{ matrix.arch }}"]
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - name: Generate image name
+        run: |
+          echo "GHCR_IMAGE=ghcr.io/${GITHUB_REPOSITORY@L}" >> ${GITHUB_ENV}
 
       - name: Login to GHCR
         uses: docker/login-action@v3