Remove unnecessary prefix

Author: XuehaiPan

.github/workflows/ci.yml

@@ -262,7 +262,7 @@ jobs:
         run: uv tool install ninja
 
       - name: Configure via preset
-        run: cmake --preset venv -DPYBIND11_CREATE_WITH_UV="python${{ matrix.python-version }}"
+        run: cmake --preset venv -DPYBIND11_CREATE_WITH_UV="${{ matrix.python-version }}"
 
       - name: Build C++11
         run: cmake --build --preset venv