Bump @angular/platform-browser from 20.3.16 to 21.1.3 in /web_embedding/ng-flutter#2795

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dependabot/npm_and_yarn/web_embedding/ng-flutter/angular/platform-browser-21.1.3flutter/samples:dependabot/npm_and_yarn/web_embedding/ng-flutter/angular/platform-browser-21.1.3Copy head branch name to clipboard