Update main.yml

Author: asottile-sentry

.github/workflows/main.yml

@@ -7,7 +7,11 @@ jobs:
       matrix:
         instance: [0, 1, 2, 3]
     steps:
-    - run: ip route get 1 | awk '{print $(NF-2);exit}'
-      if: matrix.instance == 0
-    - run: echo worker
-      if: matrix.instance != 0
+      - uses: getsentry/action-setup-venv@3a832a9604b3e1a4202ae559248f26867b467cc7 # v2.1.1
+        with:
+          python-version: 3.13.1
+          install-cmd: pip install psutil==5.9.7 -i https://pypi.devinfra.sentry.io/simple
+      - run: |
+          set -x
+          env | sort
+          python3 -c 'import psutil; print(sorted(psutil.Process.open_files()))'