fix: fix failing tests

@evilebottnawi caused by merge conflict in webpack-contrib#1219

Author: isaacl

test/sourceMap-option.test.js

@@ -501,7 +501,7 @@ describe('"sourceMap" option', () => {
 
       expect(chunkName).toBe(
         webpack.version[0] === '5'
-          ? 'main.7874af87d58bb3928914.bundle.js'
+          ? 'main.81d6a28d012832093109.bundle.js'
           : 'main.535d928b9abb27709302.bundle.js'
       );
       expect(