Bump handlebars from 4.7.8 to 4.7.9 in /App/frontend-app#582

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dependabot/npm_and_yarn/App/frontend-app/handlebars-4.7.9microsoft/Document-Knowledge-Mining-Solution-Accelerator:dependabot/npm_and_yarn/App/frontend-app/handlebars-4.7.9Copy head branch name to clipboard