Update changelog & docs

Author: twistedfall

CHANGES.md

@@ -1,5 +1,8 @@
+* 0.97.2
+  * Expose legacy tracking types too (fixes https://github.com/twistedfall/opencv-rust/issues/700).
+
 * 0.97.1
-  * Fix building when OpenCV headers are symlinks (fixes https://github.com/twistedfall/opencv-rust/issues/697, kudos to matanox)
+  * Fix building when OpenCV headers are symlinks (fixes https://github.com/twistedfall/opencv-rust/issues/697, kudos to matanox).
 
 * 0.97.0
   * Static building has been improved for the cases where there are both static and dynamic libraries present: "static=" prefix is