update developer notes (use explicit python 3 ...
... interpreter when creating a virtualenv)
@@ -6,7 +6,7 @@ See [docs/code-testing.md](https://github.com/googlefonts/fontbakery/blob/master
## Updating the distribution package
-Releases to PyPI are performed by tagging a commit and then running the following commands (with the proper version number and date):
+Releases to PyPI are performed by running the following commands (with the proper version number and date):
```sh
# cleanup
@@ -15,7 +15,7 @@ rm dist/ -rf
rm venv/ -rf
# create a fresh python virtual env
-virtualenv venv
+virtualenv venv -ppython3
. venv/bin/activate
# Install tox and run our code tests
