put version var into env file for release_main.yaml

Author: nmdefries

.github/workflows/release_main.yml

@@ -29,8 +29,8 @@ jobs:
         id: extract_version
         run: |
           python -m pip install bump2version
-          echo -n "::set-output name=version::"
-          bump2version --dry-run --list patch | grep ^current_version | sed -r s,"^.*=",,
+          currentVersion=`bump2version --dry-run --list patch | grep ^current_version | sed -r s,"^.*=",,`
+          echo "version=$currentVersion" >> "$GITHUB_OUTPUT"
       - name: Create Release
         id: create_release
         uses: release-drafter/release-drafter@v5