fix(ci): activate virtual environment before running ty check

Author: THEGOLDENPRO

.github/workflows/ty_type_check.yml

@@ -18,4 +18,4 @@ jobs:
       - run: python -m pip install . --group dev
 
       - name: Run ty check
-        run: ty check --output-format=github .
+        run: source .venv/bin/activate && ty check --output-format=github .