Attempt to fix windows build

Author: breiler

.github/workflows/release.yaml

@@ -253,17 +253,17 @@ jobs:
 
       - name: Build
         run: |
-          export REVISION=${GITHUB_REF_NAME:1}
-          export CHANGELIST=""
-          echo "Building version ${REVISION}${CHANGELIST}"
-          ./mvnw clean install -DskipTests -Drevision=${REVISION} -Dchangelist=${CHANGELIST}
+          $env:REVISION = $env:GITHUB_REF_NAME.Substring(1)
+          $env:CHANGELIST = ""
+          echo "Building version $env:REVISION$env:CHANGELIST"
+          ./mvnw clean install -DskipTests -Drevision=$env:REVISION -Dchangelist=$env:CHANGELIST
 
       - name: Package Windows
         run: |
-          export REVISION=${GITHUB_REF_NAME:1}
-          export CHANGELIST=""
-          echo "Packaging version ${REVISION}${CHANGELIST}"
-          ./mvnw package -pl ugs-fx -P fx-build-windows -Drevision=${REVISION} -Dchangelist=${CHANGELIST}
+          $env:REVISION = $env:GITHUB_REF_NAME.Substring(1)
+          $env:CHANGELIST = ""
+          echo "Packaging version $env:REVISION$env:CHANGELIST"
+          ./mvnw package -pl ugs-fx -P fx-build-windows -Drevision=$env:REVISION -Dchangelist=$env:CHANGELIST
 
       - name: Upload binaries to snapshot release
         uses: xresloader/upload-to-github-release@v1