Bump css-loader from 6.7.1 to 7.1.2 in /src/microsoft-trydotnet-editor#21

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dependabot/npm_and_yarn/src/microsoft-trydotnet-editor/css-loader-7.1.2IntelliTect/try:dependabot/npm_and_yarn/src/microsoft-trydotnet-editor/css-loader-7.1.2Copy head branch name to clipboard