CI python 3.6 bug fix (#776)

Author: WilliamBergamin

.github/workflows/tests.yml

@@ -7,7 +7,8 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    # Avoiding -latest due to https://github.com/actions/setup-python/issues/162
+    runs-on: ubuntu-20.04
     timeout-minutes: 10
     strategy:
       matrix:
@@ -50,7 +51,7 @@ jobs:
           pytest tests/adapter_tests/django/
       - name: Run tests for HTTP Mode adapters (Falcon 3.x)
         run: |
-            pytest tests/adapter_tests/falcon/
+          pytest tests/adapter_tests/falcon/
       - name: Run tests for HTTP Mode adapters (Falcon 2.x)
         run: |
           # Falcon 2.x does not support Python 3.11 or newer