Add PYTHONIOENCODING environment variable

Author: Tobias-Fischer

.github/workflows/testpr.yml

@@ -4,6 +4,7 @@ on:
 
 env:
   ROS_VERSION: 2
+  PYTHONIOENCODING: utf-8
   # Change to 'true' to enable the cache upload as artifacts
   SAVE_CACHE_AS_ARTIFACT: 'true'
   # Change to 'true' to ignore cache and force a full rebuild, but please restore to 'false' before merging