Update dependency postcss to v8.4.16 (#5055)

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

Author: renovate[bot]

package.json

@@ -132,7 +132,7 @@
     "webpack": "5.74.0"
   },
   "resolutions": {
-    "ember-css-modules/postcss": "8.4.14",
+    "ember-css-modules/postcss": "8.4.16",
     "ember-inflector": "4.0.2",
     "ember-modifier": "3.2.7",
     "miragejs": "0.1.45"

yarn.lock

@@ -11937,10 +11937,10 @@ postcss-values-parser@^2.0.0, postcss-values-parser@^2.0.1:
     indexes-of "^1.0.1"
     uniq "^1.0.1"
 
-[email protected].14, postcss@^8.0.0, postcss@^8.1.4, postcss@^8.2.15:
-  version "8.4.14"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.14.tgz#ee9274d5622b4858c1007a74d76e42e56fd21caf"
-  integrity sha512-E398TUmfAYFPBSdzgeieK2Y1+1cpdxJx8yXbK/m57nRhKSmk1GB2tO4lbLBtlkfPQTDKfe4Xqv1ASWPpayPEig==
+[email protected].16, postcss@^8.0.0, postcss@^8.1.4, postcss@^8.2.15:
+  version "8.4.16"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.16.tgz#33a1d675fac39941f5f445db0de4db2b6e01d43c"
+  integrity sha512-ipHE1XBvKzm5xI7hiHCZJCSugxvsdq2mPnsq5+UF+VHCjiBvtDrlxJfMBToWaP9D5XlgNmcFGqoHmUn0EYEaRQ==
   dependencies:
     nanoid "^3.3.4"
     picocolors "^1.0.0"