build: avoid a windows issue

Author: mbdevpl

.github/workflows/python.yml

@@ -29,7 +29,8 @@ jobs:
       - run: cd ../argunparse && pip install -r requirements_test.txt && python setup.py build && cd -
       - run: git clone https://github.com/python-semver/python-semver ../semver
       - run: cd ../semver && python -m build && cd -
-      - run: pip install jupyter  # example package that uses metadata.json
+      - if: matrix.os != 'windows-latest'
+        run: pip install jupyter  # example package that uses metadata.json
       - run: python -m coverage run --branch --source . -m unittest -v
       - run: python -m coverage run --append --branch --source . -m unittest -v test.test_version
         env: