Update dependency postcss to v8.4.5

Author: renovate-bot

package.json

@@ -131,7 +131,7 @@
   },
   "resolutions": {
     "@ember/string": "3.0.0",
-    "ember-css-modules/postcss": "8.4.4",
+    "ember-css-modules/postcss": "8.4.5",
     "ember-inflector": "4.0.2",
     "ember-modifier": "3.0.0"
   },

yarn.lock

@@ -12079,10 +12079,10 @@ postcss-values-parser@^2.0.0, postcss-values-parser@^2.0.1:
     indexes-of "^1.0.1"
     uniq "^1.0.1"
 
-postcss@8.4.4, postcss@^8.0.0, postcss@^8.1.4, postcss@^8.2.15:
-  version "8.4.4"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.4.tgz#d53d4ec6a75fd62557a66bb41978bf47ff0c2869"
-  integrity sha512-joU6fBsN6EIer28Lj6GDFoC/5yOZzLCfn0zHAn/MYXI7aPt4m4hK5KC5ovEZXy+lnCjmYIbQWngvju2ddyEr8Q==
+postcss@8.4.5, postcss@^8.0.0, postcss@^8.1.4, postcss@^8.2.15:
+  version "8.4.5"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.5.tgz#bae665764dfd4c6fcc24dc0fdf7e7aa00cc77f95"
+  integrity sha512-jBDboWM8qpaqwkMwItqTQTiFikhs/67OYVvblFFTM7MrZjt6yMKd6r2kgXizEbTTljacm4NldIlZnhbjr84QYg==
   dependencies:
     nanoid "^3.1.30"
     picocolors "^1.0.0"