Minor: pinning poetry

Author: malachi-constant

.github/workflows/minimal-tests.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Install Requirements
         run: |
           python -m pip install --upgrade pip
-          python -m pip install poetry
+          python -m pip install poetry==1.1.15
           poetry config virtualenvs.create false --local
           poetry install --extras "sqlserver" -vvv
       - name: Test Metadata