fix(deps): update dependency postcss-loader to ^7.3.2 for gatsby-plugin-postcss (#38160)

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": "^7.20.13",
-    "postcss-loader": "^7.3.0"
+    "postcss-loader": "^7.3.2"
   },
   "devDependencies": {
     "@babel/cli": "^7.20.7",

yarn.lock

@@ -18748,10 +18748,10 @@ postcss-loader@^5.3.0:
     klona "^2.0.4"
     semver "^7.3.4"
 
-postcss-loader@^7.3.0:
-  version "7.3.0"
-  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-7.3.0.tgz#05991c1e490d8ff86ef18358d87db3b5b2dcb5f5"
-  integrity sha512-qLAFjvR2BFNz1H930P7mj1iuWJFjGey/nVhimfOAAQ1ZyPpcClAxP8+A55Sl8mBvM+K2a9Pjgdj10KpANWrNfw==
+postcss-loader@^7.3.2:
+  version "7.3.2"
+  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-7.3.2.tgz#ac3344ad1f14bb65df135744b7efae4dbdad4301"
+  integrity sha512-c7qDlXErX6n0VT+LUsW+nwefVtTu3ORtVvK8EXuUIDcxo+b/euYqpuHlJAvePb0Af5e8uMjR/13e0lTuYifaig==
   dependencies:
     cosmiconfig "^8.1.3"
     jiti "^1.18.2"