Bump debug, @microsoft/sp-build-web and @microsoft/sp-webpart-workbench in /uifbeyond#9

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dependabot/npm_and_yarn/uifbeyond/debug-and-microsoft/sp-build-web-and-microsoft/sp-webpart-workbench-2.6.9n8design/samples:dependabot/npm_and_yarn/uifbeyond/debug-and-microsoft/sp-build-web-and-microsoft/sp-webpart-workbench-2.6.9Copy head branch name to clipboard