specify python version to address failing mongo-orchestration

Author: jamis

Diff for: .github/workflows/test.yml

@@ -152,6 +152,13 @@ jobs:
       uses: actions/checkout@v2
       with:
         submodules: recursive
+
+    # the default python 3.8 doesn't cut it, and causes mongo-orchestration
+    # to fail in mongodb-labs/drivers-evergreen-tools.
+    - uses: actions/setup-python@v5
+      with:
+        python-version: '3.13'
+
     - id: start-mongodb
       name: start mongodb
       uses: mongodb-labs/drivers-evergreen-tools@master