message: added missing reference in changes.md
diff: @@ -180,6 +180,8 @@ let mut dataset = driver
  - Wrappers for `CPLSetThreadLocalConfigOption` and `CPLGetThreadLocalConfigOption`
  + - <https://github.com/georust/gdal/pull/201>
  +
  ## 0.7.1
  - fix docs.rs build for gdal-sys
  