Replace Docs URLs with relative links (#11738)

docs/en/yolov5/tutorials/train_custom_data.md

@@ -161,7 +161,7 @@ export COMET_API_KEY=<Your API Key>  # 2. paste API key
 python train.py --img 640 --epochs 3 --data coco128.yaml --weights yolov5s.pt  # 3. train
 ```
 
-To learn more about all the supported Comet features for this integration, check out the [Comet Tutorial](https://docs.ultralytics.com/yolov5/tutorials/comet_logging_integration). If you'd like to learn more about Comet, head over to our [documentation](https://bit.ly/yolov5-colab-comet-docs). Get started by trying out the Comet Colab Notebook: [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/drive/1RG0WOQyxlDlo5Km8GogJpIEJlg_5lyYO?usp=sharing)
+To learn more about all the supported Comet features for this integration, check out the [Comet Tutorial](./comet_logging_integration.md). If you'd like to learn more about Comet, head over to our [documentation](https://bit.ly/yolov5-colab-comet-docs). Get started by trying out the Comet Colab Notebook: [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/drive/1RG0WOQyxlDlo5Km8GogJpIEJlg_5lyYO?usp=sharing)
 
 <img width="1920" alt="YOLO UI" src="https://user-images.githubusercontent.com/26833433/202851203-164e94e1-2238-46dd-91f8-de020e9d6b41.png">
 
@@ -174,7 +174,7 @@ To learn more about all the supported Comet features for this integration, check
 
 You'll get all the great expected features from an experiment manager: live updates, model upload, experiment comparison etc. but ClearML also tracks uncommitted changes and installed packages for example. Thanks to that ClearML Tasks (which is what we call experiments) are also reproducible on different machines! With only 1 extra line, we can schedule a YOLOv5 training task on a queue to be executed by any number of ClearML Agents (workers).
 
-You can use ClearML Data to version your dataset and then pass it to YOLOv5 simply using its unique ID. This will help you keep track of your data without adding extra hassle. Explore the [ClearML Tutorial](https://docs.ultralytics.com/yolov5/tutorials/clearml_logging_integration) for details!
+You can use ClearML Data to version your dataset and then pass it to YOLOv5 simply using its unique ID. This will help you keep track of your data without adding extra hassle. Explore the [ClearML Tutorial](./clearml_logging_integration.md) for details!
 
 <a href="https://clear.ml/">
 <img alt="ClearML Experiment Management UI" src="https://github.com/thepycoder/clearml_screenshots/raw/main/scalars.jpg" width="1280"></a>
@@ -201,10 +201,10 @@ plot_results('path/to/results.csv')  # plot 'results.csv' as 'results.png'
 
 Once your model is trained you can use your best checkpoint `best.pt` to:
 
-- Run [CLI](https://github.com/ultralytics/yolov5#quick-start-examples) or [Python](https://docs.ultralytics.com/yolov5/tutorials/pytorch_hub_model_loading) inference on new images and videos
+- Run [CLI](https://github.com/ultralytics/yolov5#quick-start-examples) or [Python](./pytorch_hub_model_loading.md) inference on new images and videos
 - [Validate](https://github.com/ultralytics/yolov5/blob/master/val.py) accuracy on train, val and test splits
-- [Export](https://docs.ultralytics.com/yolov5/tutorials/model_export) to TensorFlow, Keras, ONNX, TFlite, TF.js, CoreML and TensorRT formats
-- [Evolve](https://docs.ultralytics.com/yolov5/tutorials/hyperparameter_evolution) hyperparameters to improve performance
+- [Export](./model_export.md) to TensorFlow, Keras, ONNX, TFlite, TF.js, CoreML and TensorRT formats
+- [Evolve](./hyperparameter_evolution.md) hyperparameters to improve performance
 - [Improve](https://docs.roboflow.com/adding-data/upload-api?ref=ultralytics) your model by sampling real-world images and adding them to your dataset
 
 ## Supported Environments