Match GitHub actions with upgrades

- Test against Python 3.10 and 3.11
- Update step versions
- Target Poetry 1.6.1

Author: phillipuniverse

.github/workflows/build.yml

@@ -10,17 +10,17 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.9', '3.10', '3.11']
+        python-version: ['3.10', '3.11']
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Python
         uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
       - name: Setup Poetry
         uses: snok/install-poetry@v1
         with:
-          version: 1.4.0
+          version: 1.6.1
           virtualenvs-create: true
           virtualenvs-in-project: true
       - name: Load cached venv