Broken docs build

.github/workflows/docs.yml

@@ -27,10 +27,9 @@ jobs:
         cache: maven
     - name: Set up refname build
       if: github.event.inputs.build-refname
-      env:
-        BUILD_REFNAME=${{ github.event.inputs.build-refname }}
       run: |
         git fetch --depth 1 https://github.com/$GITHUB_REPOSITORY "$BUILD_REFNAME"
+        export BUILD_REFNAME=${{ github.event.inputs.build-refname }}
         echo "BUILD_REFNAME=$BUILD_REFNAME" >> $GITHUB_ENV
         export BUILD_VERSION=$(git cat-file --textconv FETCH_HEAD:pom.xml | python3 -c "import xml.etree.ElementTree as xml; from sys import stdin; print(xml.parse(stdin).getroot().find('{http://maven.apache.org/POM/4.0.0}version').text)")
         echo BUILD_VERSION=$BUILD_VERSION >> $GITHUB_ENV