Add a simple example too (#145)

README.md

@@ -64,7 +64,42 @@ This will run a different set of tox environments on different python versions s
 
 #### Workflow Configuration
 
-`.github/workflows/check.yaml`:
+A bare-bones example would be `.github/workflows/check.yaml`:
+
+```yaml
+jobs:
+  test:
+    name: test with ${{ matrix.env }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        env:
+          - "3.13"
+          - "3.12"
+        os:
+          - ubuntu-latest
+          - macos-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install the latest version of uv
+        uses: astral-sh/setup-uv@v3
+      - name: Install tox
+        run: uv tool install --python-preference only-managed --python 3.13 tox --with tox-uv --with tox-gh
+      - name: Install Python
+        if: matrix.env != '3.13'
+        run: uv python install --python-preference only-managed ${{ matrix.env }}
+      - name: Setup test suite
+        run: tox run -vv --notest --skip-missing-interpreters false
+        env:
+          TOX_GH_MAJOR_MINOR: ${{ matrix.env }}
+      - name: Run test suite
+        run: tox run --skip-pkg-install
+        env:
+          TOX_GH_MAJOR_MINOR: ${{ matrix.env }}
+```
+
+A more exhaustive example would be `.github/workflows/check.yaml`:
 
 ```yaml
 name: check