enhance readme about geckodriver

Author: amacado

.github/scripts/build_assets/geckodriver-v0.27.0-win64/README.md

@@ -1 +1,6 @@
-This folder was taken from: https://github.com/mozilla/geckodriver/releases/tag/v0.27.0
+## geckodriver
+Proxy for using W3C WebDriver compatible clients to interact with Gecko-based browsers.
+This program provides the HTTP API described by the WebDriver protocol to communicate with Gecko browsers, such as Firefox. 
+It translates calls into the Marionette remote protocol by acting as a proxy between the local- and remote ends.
+
+This application was taken from: https://github.com/mozilla/geckodriver/releases/tag/v0.27.0