Bump @types/ember-feature-flags from 4.0.9 to 6.0.0#1382

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dependabot/npm_and_yarn/dependency_upgrades/types/ember-feature-flags-6.0.0CenterForOpenScience/ember-osf-web:dependabot/npm_and_yarn/dependency_upgrades/types/ember-feature-flags-6.0.0Copy head branch name to clipboard