Merge pull request #3909 from asottile/update_release

Update release procedure

Author: asottile

HOWTORELEASE.rst

@@ -28,10 +28,13 @@ taking a lot of time to make a new one.
 
 #. After all tests pass and the PR has been approved, publish to PyPI by pushing the tag::
 
+     git tag <VERSION>
      git push [email protected]:pytest-dev/pytest.git <VERSION>
 
    Wait for the deploy to complete, then make sure it is `available on PyPI <https://pypi.org/project/pytest>`_.
 
+#. Merge the PR into ``master``.
+
 #. Send an email announcement with the contents from::
 
      doc/en/announce/release-<VERSION>.rst