ci: use github env for ui preview job name (commaai#33060)

fix this

.github/workflows/ui_preview.yaml

@@ -28,15 +28,15 @@ jobs:
         uses: lewagon/[email protected]
         with:
           ref: ${{ github.event.pull_request.head.sha }}
-          check-name: $UI_JOB_NAME
+          check-name: ${{ env.UI_JOB_NAME }}
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           allowed-conclusions: success
           wait-interval: 20
 
       - name: Get workflow run ID
         id: get_run_id
         run: |
-          echo "run_id=$(curl https://api.github.com/repos/${{ github.repository }}/commits/${{ github.event.pull_request.head.sha }}/check-runs | jq -r '.check_runs[] | select(.name == "$UI_JOB_NAME") | .html_url | capture("(?<number>[0-9]+)") | .number')" >> $GITHUB_OUTPUT
+          echo "run_id=$(curl https://api.github.com/repos/${{ github.repository }}/commits/${{ github.event.pull_request.head.sha }}/check-runs | jq -r '.check_runs[] | select(.name == "${{ env.UI_JOB_NAME }}") | .html_url | capture("(?<number>[0-9]+)") | .number')" >> $GITHUB_OUTPUT
 
       - name: Checkout ci-artifacts
         uses: actions/checkout@v4