Fix poetry action issue

Author: ciaranmccormick

.github/workflows/pypi.yml

@@ -17,14 +17,7 @@ jobs:
         with:
           python-version: "3.9"
 
-      - name: Install poetry
-        run: |
-          curl -sSL \
-            "https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py" | python
-
-          # Adding `poetry` to `$PATH`:
-          echo "$HOME/.poetry/bin" >> $GITHUB_PATH
-
+      - uses: Gr1N/setup-poetry@v7
       - name: Set up cache
         uses: actions/cache@v2
         with: