Update obo-test.yml

Author: cthoyt

.github/workflows/obo-test.yml

@@ -14,6 +14,10 @@ jobs:
     if: github.triggering_actor != 'github-actions[bot]'
     steps:
       - uses: actions/checkout@v2
+
+      - name: "Install uv"
+        uses: "astral-sh/setup-uv@cec208311dfd045dd5311c1add060b2062131d57" # v8.0.0
+
       - uses: actions/setup-python@v2
         with:
           python-version: '3.9'