Fix broken link on poetry notation
And as alternative link:
@@ -42,7 +42,7 @@ This version requires a manual migration step.
3. You need to adjust name, version, description, and authors meta fields
4. You need to copy-paste dependencies from ``Pipfile`` to ``pyproject.toml``
5. You need to set correct version for each dependency in the list,
- use ``"^x.y"`` `notation <https://github.com/python-poetry/poetry#caret-requirement>`_
+ use ``"^x.y"`` `notation <https://python-poetry.org/docs/dependency-specification/#caret-requirements>`_
6. You need to adjust ``[build-system]`` tag and ``POETRY_VERSION`` variable
to fit your ``poetry`` version
7. Create ``poetry.lock`` file with ``poetry lock``
