Add Discourse at https://community.ultralytics.com (#13168)

Refactor code for speed and clarity

.github/workflows/greetings.yml

@@ -27,7 +27,7 @@ jobs:
 
             If this is a 🐛 Bug Report, please provide a **minimum reproducible example** to help us debug it.
 
-            If this is a custom training ❓ Question, please provide as much information as possible, including dataset image examples and training logs, and verify you are following our [Tips for Best Training Results](https://docs.ultralytics.com/yolov5/tutorials/tips_for_best_training_results/).
+            If this is a custom training ❓ Question, please provide as much information as possible, including dataset image examples and training logs, and verify you are following our [Tips for Best Training Results](https://docs.ultralytics.com/guides/model-training-tips//).
 
             ## Requirements