[IEDriver] Updating CHANGELOG

[skip ci]

Author: diemol

cpp/iedriverserver/CHANGELOG

@@ -9,6 +9,10 @@ available via the project downloads page. Changes in "revision" field indicate
 private releases checked into the prebuilts directory of the source tree, but
 not made generally available on the downloads page.
 
+v4.8.0.0
+========
+* Remove unnecessary executable permission bit from several files (#11502)
+
 v4.7.0.0
 ========
 * Ignore Zoom Level for Edge IE Mode (#11055)