Fix: create .venv when publishing so that maturin doesn't crash (#2675)

* Fix: create .venv when publishing so that maturin doesn't crash

* Activate the venv as well

* Move venv activation to the front, include in build & publish rule too

* Another source venv command for the make docs rule

.github/workflows/python-publish.yml

@@ -16,6 +16,8 @@ jobs:
         python-version: "3.10"
     - name: Install dependencies
       run: |
+        python -m venv .venv
+        source ./.venv/bin/activate
         python -m pip install --upgrade pip
         pip install setuptools wheel twine
         make install-dev
@@ -24,10 +26,13 @@ jobs:
         TWINE_USERNAME: __token__
         TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}
       run: |
+        source ./.venv/bin/activate
         python setup.py sdist bdist_wheel
         twine upload dist/*
     - name: Update API docs
-      run: make docs
+      run: |
+        source ./.venv/bin/activate
+        make docs
     - name: Update CHANGELOG
       id: changelog
       uses: requarks/changelog-action@v1