fix the python version to 3.8 on release

Author: mariotoffia

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: "3.x"
+          python-version: "3.8"
       - name: Install build-dependencies
         run: |
           make build-dependencies

Makefile

@@ -17,10 +17,8 @@ build-dependencies:
 	@pip install -r requirements/build.txt
 build:
 	@rm -rf README.rst
-	@cp README.md pypwext
 	@python tools/versions.py
 	@python -m build
-	@rm -rf pypwext/README.md
 publish:
 	@python -m twine upload dist/* --config-file ./.pypirc
 freeze: