feat(workflows): include slow tests within update baselines workflow

Author: harryswift01

.github/workflows/update_regression_baselines.yaml

@@ -33,7 +33,7 @@ jobs:
           python -m pip install -e .[testing]
 
       - name: Update regression baselines
-        run: pytest tests/regression --update-baselines
+        run: pytest tests/regression --update-baselines --run-slow
 
       - name: Commit updated baselines
         uses: stefanzweifel/git-auto-commit-action@778341af668090896ca464160c2def5d1d1a3eb0 # v6