Update _release.yml

Author: haiyang679

.github/workflows/_release.yml

@@ -15,7 +15,7 @@ on:
         default: '.'
         description: "From which folder this pipeline executes"
 env:
-  PYTHON_VERSION: "3.9"
+  PYTHON_VERSION: "3.8"
   POETRY_VERSION: "1.7.1"
 
 jobs: