MQE-2210: Merge DevDoc changes in master back into MFTF release branch

Author: tomreece

CHANGELOG.md

@@ -132,9 +132,6 @@ Magento Functional Testing Framework Changelog
 ### Fixes
 * added dependency to packages MFTF used but never specified in composer.json
 
-2.6.3
------
-
 ### New Feature
 * `--filter` option was added to `bin/mftf generate:tests` command. For more details please go to https://devdocs.magento.com/mftf/docs/commands/mftf.html#generatetests