docs: fix broken links and 404s (lance-format#5284)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: prrao87

README.md

@@ -53,7 +53,7 @@ The key features of Lance include:
 For more details, see the full [Lance format specification](https://lance.org/format).
 
 > [!TIP]
-> Lance is in active development and we welcome contributions. Please see our [contributing guide](https://lance.org/docs/community/contributing) for more information.
+> Lance is in active development and we welcome contributions. Please see our [contributing guide](https://lance.org/community/contributing/) for more information.
 
 ## Quick Start
 

docs/CONTRIBUTING.md

@@ -19,7 +19,7 @@ uv run mkdocs serve
 ### Python Generated Doc
 
 Python code documentation is built using Sphinx in [lance-python-doc](https://github.com/lancedb/lance-python-doc),
-and published through [Github Pages](https://lancedb.github.io/lance-python-doc/) in ReadTheDocs style.
+and published through [Github Pages](https://lance-format.github.io/lance-python-doc/) in ReadTheDocs style.
 
 ### Rust Generated Doc