Add missing env (#1892)

This PR adds a missing env to allow publishing the Docker image.

.github/workflows/release-50_publish-docker.yml

@@ -114,6 +114,7 @@ jobs:
     if: ${{ inputs.binary == 'polkadot-parachain' || inputs.image_type == 'rc' }}
     runs-on: ubuntu-latest
     needs: fetch-artifacts
+    environment: master
 
     steps:
       - name: Checkout sources
@@ -237,6 +238,7 @@ jobs:
     if: ${{ inputs.binary == 'polkadot' && inputs.image_type == 'release' }}
     runs-on: ubuntu-latest
     needs: fetch-latest-debian-package-version
+    environment: master
     steps:
       - name: Checkout sources
         uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4.1.0