updating change log: LCP endpoint

Author: tkadlec

src/change-log.md

@@ -6,6 +6,7 @@ eleventyNavigation:
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 # WebPageTest Change Log
 ## January, 2022
+- **January 19** WebPageTest [now exposes Largest Contentful Paint as a comparison endpoint for our filmstrips](https://twitter.com/tkadlec/status/1483816634825551883), making it easier to compare LCP across test runs.
 - **January 18** The WebPageTest agent now [supports a new script command](https://twitter.com/patmeenan/status/1483490979944488966) (`waitFor`) that tells the testing agent to poll the page until a provided snippet of JavaScript evaluates to true. [PR #462](https://github.com/WPO-Foundation/wptagent/pull/462)
 - **January 14** The WebPageTest API supports a new parameter (`wappalyzer`) to conditionally turn off Wappalyzer detection, resulting in faster test results. [PR #459](https://github.com/WPO-Foundation/wptagent/pull/459)
 ## September, 2021