fix(gatsby-plugin-netlify-cms): align mini-css-extract-plugin version (#31093)

Author: erezrokah

packages/gatsby-plugin-netlify-cms/package.json

@@ -13,7 +13,7 @@
     "html-webpack-plugin": "^3.2.0",
     "html-webpack-tags-plugin": "^2.0.17",
     "lodash": "^4.17.20",
-    "mini-css-extract-plugin": "^0.12.0",
+    "mini-css-extract-plugin": "^0.11.2",
     "netlify-identity-widget": "^1.9.1",
     "webpack": "^4.46.0"
   },

yarn.lock

@@ -17557,16 +17557,6 @@ mini-css-extract-plugin@^0.11.2:
     schema-utils "^1.0.0"
     webpack-sources "^1.1.0"
 
-mini-css-extract-plugin@^0.12.0:
-  version "0.12.0"
-  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.12.0.tgz#ddeb74fd6304ca9f99c1db74acc7d5b507705454"
-  integrity sha512-z6PQCe9rd1XUwZ8gMaEVwwRyZlrYy8Ba1gRjFP5HcV51HkXX+XlwZ+a1iAYTjSYwgNBXoNR7mhx79mDpOn5fdw==
-  dependencies:
-    loader-utils "^1.1.0"
-    normalize-url "1.9.1"
-    schema-utils "^1.0.0"
-    webpack-sources "^1.1.0"
-
 mini-svg-data-uri@^1.2.3:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/mini-svg-data-uri/-/mini-svg-data-uri-1.2.3.tgz#e16baa92ad55ddaa1c2c135759129f41910bc39f"