Update README.md

Add absolute links for Pypi.

README.md

@@ -105,7 +105,7 @@ For a full list of supported models, please refer to the `SUPPORTED_ESTIMATORS`
 
 We welcome contributions to OpenModels! Whether you want to add support for new models, implement new serialization formats, or improve the existing codebase, your help is appreciated.
 
-Please refer to our [Contributing Guidelines](CONTRIBUTING.md) for more information on how to get started.
+Please refer to our [Contributing Guidelines](https://github.com/SF-Tec/openmodels/blob/main/CONTRIBUTING.md) for more information on how to get started.
 
 ## Running Tests
 
@@ -131,14 +131,14 @@ To run the tests:
 
 ## License
 
-This project is licensed under the MIT License. See the [LICENSE](LICENSE) file for details.
+This project is licensed under the MIT License. See the [LICENSE](https://github.com/SF-Tec/openmodels/blob/main/LICENSE) file for details.
 
 ## Changelog
 
-For a detailed changelog, please see the [CHANGELOG.md](CHANGELOG.md) file.
+For a detailed changelog, please see the [CHANGELOG.md](https://github.com/SF-Tec/openmodels/blob/main/CHANGELOG.md) file.
 
 ## Support
 
-If you encounter any issues or have questions, please [file an issue](https://github.com/SF-Tec/openmodels) on our GitHub repository.
+If you encounter any issues or have questions, please [file an issue](https://github.com/SF-Tec/openmodels/issues/new) on our GitHub repository.
 
 We're always looking to improve OpenModels. If you have any suggestions or feature requests, please let us know!