Apply suggestions from code review

Co-authored-by: Francesco Lodolo <flod@lodolo.net>

Author: eemeli

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: [3.9, "3.10", 3.11, 3.12, 3.13, 3.14]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
       - uses: actions/checkout@v6
       - uses: astral-sh/setup-uv@v7
@@ -48,8 +48,8 @@ jobs:
       - uses: actions/checkout@v6
       - uses: astral-sh/setup-uv@v7
         with:
-          python-version: 3.9
-      - run: uv venv --python 3.9
+          python-version: 3.12
+      - run: uv venv
       - run: uv pip install ${{ matrix.fluent-syntax }}
       - run: uv pip install ./fluent.runtime
       - run: uv run python -m unittest discover -s fluent.runtime