CI: Fix bug in post-release workflow (#103368)

version should be prefixed with a v

.github/workflows/release-comms.yml

@@ -41,7 +41,7 @@ jobs:
         echo "LATEST=${{ inputs.latest && '1' || '0' }}" >> $GITHUB_ENV
     - if: ${{ github.event.pull_request.merged == true && startsWith(github.head_ref, 'release/') }}
       run: |
-        echo "VERSION=$(echo ${{ github.head_ref }} | sed -e 's/release\/.*\///g')" >> $GITHUB_ENV
+        echo "VERSION=$(echo ${{ github.head_ref }} | sed -e 's/release\/.*\//v/g')" >> $GITHUB_ENV
         echo "DRY_RUN=${{ contains(github.event.pull_request.labels.*.name, 'release/dry-run') }}" >> $GITHUB_ENV
         echo "LATEST=${{ contains(github.event.pull_request.labels.*.name, 'release/latest') && '1' || '0' }}" >> $GITHUB_ENV
     - id: output