fix(deps): update dependency postcss-loader to ^7.0.2 for gatsby-plugin-postcss (#37372)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

packages/gatsby-plugin-postcss/package.json

@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "@babel/runtime": "^7.15.4",
-    "postcss-loader": "^7.0.1"
+    "postcss-loader": "^7.0.2"
   },
   "devDependencies": {
     "@babel/cli": "^7.15.4",

yarn.lock

@@ -18548,14 +18548,14 @@ postcss-loader@^5.3.0:
     klona "^2.0.4"
     semver "^7.3.4"
 
-postcss-loader@^7.0.1:
-  version "7.0.1"
-  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-7.0.1.tgz#4c883cc0a1b2bfe2074377b7a74c1cd805684395"
-  integrity sha512-VRviFEyYlLjctSM93gAZtcJJ/iSkPZ79zWbN/1fSH+NisBByEiVLqpdVDrPLVSi8DX0oJo12kL/GppTBdKVXiQ==
+postcss-loader@^7.0.2:
+  version "7.0.2"
+  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-7.0.2.tgz#b53ff44a26fba3688eee92a048c7f2d4802e23bb"
+  integrity sha512-fUJzV/QH7NXUAqV8dWJ9Lg4aTkDCezpTS5HgJ2DvqznexTbSTxgi/dTECvTZ15BwKTtk8G/bqI/QTu2HPd3ZCg==
   dependencies:
     cosmiconfig "^7.0.0"
     klona "^2.0.5"
-    semver "^7.3.7"
+    semver "^7.3.8"
 
 postcss-merge-longhand@^4.0.11:
   version "4.0.11"