build(deps-dev): bump webpack-merge from 5.8.0 to 5.9.0 in /frontend#1921

marco-c merged 1 commit intomastermozilla/code-coverage:masterfrom

dependabot/npm_and_yarn/frontend/webpack-merge-5.9.0mozilla/code-coverage:dependabot/npm_and_yarn/frontend/webpack-merge-5.9.0Copy head branch name to clipboard