Summary:
- Update few stale GitHub wiki link references from rocksdb.org
- Update the API comments for ignore_range_deletions
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8983
Reviewed By: ajkr
Differential Revision: D31355965
Pulled By: ramvadiv
fbshipit-source-id: 245ac4a6913976dd82afa308bc4aae6bff3d788c