github/action: run static checks with uv.

The static-checks.py needs the python virtual env to be activated to run
`ruff`.
Use `uv run ./static-checks.py` instead of just calling
`./static-checks.py`.

Change-Id: Ic5ba06a85e89cb34fabe87a318228078be2d5981
Priv-Id: c6188b5e6f896670224b334c8169a7395dc97abe

Author: nicopauss

.github/workflows/tests.yml

@@ -76,4 +76,4 @@ jobs:
           ASAN_OPTIONS: 'handle_segv=0:detect_leaks=1'
 
       - name: Static checks
-        run: ./static-checks.py
+        run: uv run ./static-checks.py