fix variable name

Author: sjanssen2

.github/workflows/buildContainer.yaml

@@ -22,7 +22,7 @@ jobs:
         with:
           registry: harbor.computational.bio.uni-giessen.de
           username: ${{ vars.HARBOR_CB_USERNAME }}
-          password: ${{ secrets.HARBOR_CB_TOKEN }}
+          password: ${{ secrets.HARBOR_CB_SECRET }}
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3