Document the JSON viewer's Search/Find UI

[mikehoffms]

Rendered article section for review:

• View formatted JSON article > Search the JSON data h2 section
  • https://review.learn.microsoft.com/microsoft-edge/devtools-guide-chromium/json-viewer/json-viewer?branch=pr-en-us-3060#search-the-json-data
  • Before/Live

AB#49007933

[learn-build-service-prod[bot]]

Learn Build status updates of commit 8c5ce3f:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
microsoft-edge/devtools-guide-chromium/json-viewer/json-viewer.md	:white_check_mark:Succeeded	View
microsoft-edge/devtools-guide-chromium/json-viewer/json-viewer-images/search.png	:white_check_mark:Succeeded	View
microsoft-edge/devtools-guide-chromium/json-viewer/json-viewer-images/search-modes.png	:white_check_mark:Succeeded	View
microsoft-edge/devtools-guide-chromium/json-viewer/json-viewer-images/search-move.png	:white_check_mark:Succeeded	View

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[hkal]

@captainbrosset - LGTM