message: added breaking change to changes.md
diff: - Added `rename` and `delete` to `gdal::Driver`
  - <https://github.com/georust/gdal/pull/226>
  +- **Breaking**: File paths must now implement `AsRef<Path>`
  + - <https://github.com/georust/gdal/pull/230>
  +
  ## 0.8 - 0.10
  - Update types to fix build on ppc64le.
  