chore: typo

Author: Kocal

test/WebpackConfig.js

@@ -873,7 +873,7 @@ describe('WebpackConfig object', () => {
             }).to.throw('must be a callback function');
         });
 
-        it('TypeScript can not be compiled by ts-loader is Babel is already handling TypeScript', () => {
+        it('TypeScript can not be compiled by ts-loader if Babel is already handling TypeScript', () => {
             const config = createConfig();
             config.enableBabelTypeScriptPreset();