Bump mini-css-extract-plugin from 2.9.3 to 2.9.4

Bumps [mini-css-extract-plugin](https://github.com/webpack-contrib/mini-css-extract-plugin) from 2.9.3 to 2.9.4.
- [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](webpack/mini-css-extract-plugin@v2.9.3...v2.9.4)

---
updated-dependencies:
- dependency-name: mini-css-extract-plugin
  dependency-version: 2.9.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -33,7 +33,7 @@
     "jquery-ujs": "^1.2.3",
     "jstree": "^3.3.17",
     "keycharm": "^0.4.0",
-    "mini-css-extract-plugin": "^2.9.3",
+    "mini-css-extract-plugin": "^2.9.4",
     "moment": "^2.30.1",
     "opensans-webkit": "^1.1.0",
     "pnp-webpack-plugin": "^1.7.0",

yarn.lock

@@ -2634,7 +2634,7 @@ __metadata:
     jquery-ujs: "npm:^1.2.3"
     jstree: "npm:^3.3.17"
     keycharm: "npm:^0.4.0"
-    mini-css-extract-plugin: "npm:^2.9.3"
+    mini-css-extract-plugin: "npm:^2.9.4"
     moment: "npm:^2.30.1"
     opensans-webkit: "npm:^1.1.0"
     pnp-webpack-plugin: "npm:^1.7.0"
@@ -4870,15 +4870,15 @@ __metadata:
   languageName: node
   linkType: hard
 
-"mini-css-extract-plugin@npm:^2.9.3":
-  version: 2.9.3
-  resolution: "mini-css-extract-plugin@npm:2.9.3"
+"mini-css-extract-plugin@npm:^2.9.4":
+  version: 2.9.4
+  resolution: "mini-css-extract-plugin@npm:2.9.4"
   dependencies:
     schema-utils: "npm:^4.0.0"
     tapable: "npm:^2.2.1"
   peerDependencies:
     webpack: ^5.0.0
-  checksum: 10c0/2e661aeba2ffd6f8b8d618de3498c495f1e1628b76a8e3fb31f3685586d12ba7d166788b1d57912becff5a0f700c74625e4fe9d54874176d7a218af0c6f7c24f
+  checksum: 10c0/76f9e471784d52435ea766ce576ad23d37d0ea51c32ddc56414c8fdf14f7de44202dbc772cdf7549b7e54a5e56f569af93cfbd036d62d13ff8fd9571e53353b7
   languageName: node
   linkType: hard