Try to get tests working take 5

.github/workflows/python-app.yaml

@@ -14,14 +14,12 @@ jobs:
     name: Runs tests that require python 2
     runs-on: ubuntu-latest
     container:
-      image: python:2.7.18-stretch
+      image: python:2.7.18-buster
 
     steps:
-    - uses: actions/checkout@v3
-    - name: Initialize submodules cause we don't have git 2.18
-      run: |
-        cd unrpyc/unrpyc
-        git submodule update --init --recursive
+    - uses: actions/checkout@v4
+      with:
+        submodules: recursive
     # - name: Set up Python 2.7
     #   uses: actions/setup-python@v2
     #   with: