Merge pull request magento#529 from magento/2.5.4-DemoLink

2.5.4 demo link

Author: KevinBKozan

CHANGELOG.md

@@ -2,7 +2,7 @@ Magento Functional Testing Framework Changelog
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 2.5.4
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-
+[Demo Video](https://www.youtube.com/watch?v=tguvkw1HWKg)
 * Traceability
     * Introduced new `mftf doctor` command
         * Command verifies and troubleshoots some configuration steps required for running tests