Fix poetry in release CI (#67)

Author: cyc60

.github/workflows/release.yaml

@@ -57,7 +57,7 @@ jobs:
           python-version: ${{ matrix.PYTHON_VERSION }}
 
       - name: Install Poetry
-        uses: snok/install-poetry@v1
+        uses: snok/install-poetry@v1.3.1
         with:
           virtualenvs-create: true
           virtualenvs-in-project: true