specify install poetry1.8.4

Author: zyxue

.github/workflows/python-package.yml

@@ -25,7 +25,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip poetry
+        python -m pip install --upgrade pip poetry==1.8.4
         poetry install
     - name: Lint
       run: |