Pin Poetry version

Author: jacebrowning

.github/workflows/main.yml

@@ -9,6 +9,7 @@ jobs:
     strategy:
       matrix:
         python-version: ['3.11']
+        poetry-version: ['1.8.5']
 
     steps:
     - uses: actions/checkout@v4
@@ -18,7 +19,9 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
-    - uses: Gr1N/setup-poetry@v8
+    - uses: abatilo/actions-poetry@v4
+      with:
+        poetry-version: ${{ matrix.poetry-version }}
 
     - name: Check dependencies
       run: make doctor