chore(fast-html): use @microsoft/fast-build to build deep-merge fixture#7390

janechu merged 1 commit intomainmicrosoft/fast:mainfrom

users/janechu/update-fixture-to-use-fast-build-deep-mergemicrosoft/fast:users/janechu/update-fixture-to-use-fast-build-deep-mergeCopy head branch name to clipboard