Add beginner_source/introyt/introy.py to validate_tutorial_built.py to skip building since there is no code

Author: svekars

.jenkins/validate_tutorials_built.py

@@ -10,6 +10,7 @@
 
 NOT_RUN = [
     "beginner_source/basics/intro",  # no code
+    "beginner_source/introyt/introyt", # no code
     "beginner_source/onnx/intro_onnx",
     "beginner_source/profiler",
     "beginner_source/saving_loading_models",