Revert "Try with setup-python action"

This reverts commit 2349a41.

Author: cbrnr

.github/workflows/run-tests.yml

@@ -19,10 +19,10 @@ jobs:
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
     steps:
       - uses: actions/checkout@v4
-      - uses: astral-sh/setup-uv@v3
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
+      - name: Setup uv
+        uses: astral-sh/setup-uv@v3
+      - name: Install Python ${{ matrix.python-version }}
+        run: uv python install ${{ matrix.python-version }}
       - name: Install libsndfile
         if: startsWith(matrix.os, 'ubuntu')
         run: |