Bump mini-css-extract-plugin from 1.3.3 to 1.3.4 (#15572)

Bumps [mini-css-extract-plugin](https://github.com/webpack-contrib/mini-css-extract-plugin) from 1.3.3 to 1.3.4.
- [Release notes](https://github.com/webpack-contrib/mini-css-extract-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/mini-css-extract-plugin/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/mini-css-extract-plugin/compare/v1.3.3...v1.3.4)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -111,7 +111,7 @@
     "lodash": "^4.17.19",
     "mark-loader": "^0.1.6",
     "marky": "^1.2.1",
-    "mini-css-extract-plugin": "^1.3.3",
+    "mini-css-extract-plugin": "^1.3.4",
     "mkdirp": "^1.0.4",
     "npmlog": "^4.1.2",
     "object-assign": "^4.1.1",

yarn.lock

@@ -7105,10 +7105,10 @@ min-indent@^1.0.0:
   resolved "https://registry.yarnpkg.com/min-indent/-/min-indent-1.0.1.tgz#a63f681673b30571fbe8bc25686ae746eefa9869"
   integrity sha512-I9jwMn07Sy/IwOj3zVkVik2JTvgpaykDZEigL6Rx6N9LbMywwUSMtxET+7lVoDLLd3O3IXwJwvuuns8UB/HeAg==
 
-mini-css-extract-plugin@^1.3.3:
-  version "1.3.3"
-  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-1.3.3.tgz#7802e62b34199aa7d1a62e654395859a836486a0"
-  integrity sha512-7lvliDSMiuZc81kI+5/qxvn47SCM7BehXex3f2c6l/pR3Goj58IQxZh9nuPQ3AkGQgoETyXuIqLDaO5Oa0TyBw==
+mini-css-extract-plugin@^1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-1.3.4.tgz#706e69632cdcdb8b15bf8e638442a0dba304a9c8"
+  integrity sha512-dNjqyeogUd8ucUgw5sxm1ahvSfSUgef7smbmATRSbDm4EmNx5kQA6VdUEhEeCKSjX6CTYjb5vxgMUvRjqP3uHg==
   dependencies:
     loader-utils "^2.0.0"
     schema-utils "^3.0.0"