fix: user dash for lab prefix name (#1044)

Author: cloudnull

.github/workflows/smoke-deploy-lab.yaml

@@ -71,7 +71,7 @@ jobs:
       - name: Statically set environment variable
         if: ${{ github.event_name == 'workflow_dispatch' }}
         run: |
-          echo "LAB_NAME_PREFIX=$(echo '${{ github.event.inputs.gatewayDomain }}' | tr '.' '_')" >> $GITHUB_ENV
+          echo "LAB_NAME_PREFIX=$(echo '${{ github.event.inputs.gatewayDomain }}' | tr '.' '-')" >> $GITHUB_ENV
           echo "GATEWAY_DOMAIN=${{ github.event.inputs.gatewayDomain }}" >> $GITHUB_ENV
           echo "ACME_EMAIL=${{ github.event.inputs.acmeEmail }}" >> $GITHUB_ENV
           echo "OS_IMAGE=${{ github.event.inputs.osImage }}" >> $GITHUB_ENV