Specify Poetry ver in Release Workflow

It seems to require a specific version rather than constraint :(

.github/workflows/release.yml

@@ -21,7 +21,7 @@ jobs:
     - name: Install Poetry
       uses: abatilo/actions-poetry@v2.1.0
       with:
-        poetry-version: '1.x'
+        poetry-version: '1.1.6'
     - name: Configure poetry
       run: poetry config virtualenvs.in-project true
     - name: Install dependencies