Update CONTRIBUTING.md

Author: skim0119

CONTRIBUTING.md

@@ -50,9 +50,9 @@ Follow the installation instructions from the [official uv documentation](https:
 
 ```bash
 make install-dev-deps
+source .venv/bin/activate    # On Unix/macOS
+# .venv\Scripts\activate     # On Windows
 make pre-commit-install  # Optional: to run pre-commit hooks
-source .venv/bin/activate  # On Unix/macOS
-.venv\Scripts\activate     # On Windows
 ```
 
 4. (Optional) Documentation
@@ -173,4 +173,4 @@ If you are interested in contributing or modifying the documentation, please ref
 [help-wanted]: https://github.com/GazzolaLab/PyElastica/labels/help%20wanted
 
 [numpydoc-guideline]: https://numpydoc.readthedocs.io/en/latest/format.html
-[docs-readme]: https://github.com/GazzolaLab/PyElastica/blob/master/docs/README.md
+[docs-readme]: https://github.com/GazzolaLab/PyElastica/blob/master/docs/README.md