Switch to the release env (#1910)

Follow up of #1892, this PR now switches the env for release related
workflows from `master` to `release`.

.github/workflows/check-licenses.yml

@@ -20,7 +20,7 @@ jobs:
           node-version: "18.x"
           registry-url: "https://npm.pkg.github.com"
           scope: "@paritytech"
-        
+
       - name: Check the licenses in Polkadot
         run: |
           shopt -s globstar

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

@@ -114,7 +114,7 @@ jobs:
     if: ${{ inputs.binary == 'polkadot-parachain' || inputs.image_type == 'rc' }}
     runs-on: ubuntu-latest
     needs: fetch-artifacts
-    environment: master
+    environment: release
 
     steps:
       - name: Checkout sources
@@ -238,7 +238,7 @@ jobs:
     if: ${{ inputs.binary == 'polkadot' && inputs.image_type == 'release' }}
     runs-on: ubuntu-latest
     needs: fetch-latest-debian-package-version
-    environment: master
+    environment: release
     steps:
       - name: Checkout sources
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1