Update test.yml

Author: iurisilvio

.github/workflows/test.yml

@@ -9,6 +9,8 @@ on:
 jobs:
   build:
     runs-on: windows-latest
+    env:
+      PYTHONUTF8: 1
     strategy:
       matrix:
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]