⬆️ Bump postcss from 6.0.23 to 8.4.38 in /client

Bumps [postcss](https://github.com/postcss/postcss) from 6.0.23 to 8.4.38.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@6.0.23...8.4.38)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

client/yarn.lock

@@ -6961,9 +6961,9 @@ multicast-dns@^7.2.5:
     dns-packet "^5.2.2"
     thunky "^1.0.2"
 
-nanoid@^3.3.6:
-  version "3.3.6"
-  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.6.tgz#443380c856d6e9f9824267d960b4236ad583ea4c"
+nanoid@^3.3.7:
+  version "3.3.7"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.7.tgz#d0c301a691bc8d54efa0a2226ccf3fe2fd656bd8"
 
 natural-compare-lite@^1.4.0:
   version "1.4.0"
@@ -7847,7 +7847,7 @@ postcss-value-parser@^4.0.0, postcss-value-parser@^4.1.0, postcss-value-parser@^
 
 postcss@^6.0.9:
   version "6.0.23"
-  resolved "https://registry.npmjs.org/postcss/-/postcss-6.0.23.tgz"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.23.tgz#61c82cc328ac60e677645f979054eb98bc0e3324"
   dependencies:
     chalk "^2.4.1"
     source-map "^0.6.1"
@@ -7861,12 +7861,12 @@ postcss@^7, postcss@^7.0.18, postcss@^7.0.32, postcss@^7.0.35:
     source-map "^0.6.1"
 
 postcss@^8, postcss@^8.3.5, postcss@^8.4.18, postcss@^8.4.4:
-  version "8.4.31"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.31.tgz#92b451050a9f914da6755af352bdc0192508656d"
+  version "8.4.38"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.38.tgz#b387d533baf2054288e337066d81c6bee9db9e0e"
   dependencies:
-    nanoid "^3.3.6"
+    nanoid "^3.3.7"
     picocolors "^1.0.0"
-    source-map-js "^1.0.2"
+    source-map-js "^1.2.0"
 
 prelude-ls@^1.2.1:
   version "1.2.1"
@@ -8752,10 +8752,14 @@ source-list-map@^2.0.0, source-list-map@^2.0.1:
   version "2.0.1"
   resolved "https://registry.npmjs.org/source-list-map/-/source-list-map-2.0.1.tgz"
 
-source-map-js@^1.0.1, source-map-js@^1.0.2:
+source-map-js@^1.0.1:
   version "1.0.2"
   resolved "https://registry.npmjs.org/source-map-js/-/source-map-js-1.0.2.tgz"
 
+source-map-js@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.2.0.tgz#16b809c162517b5b8c3e7dcd315a2a5c2612b2af"
+
 source-map-loader@^3.0.0:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/source-map-loader/-/source-map-loader-3.0.2.tgz#af23192f9b344daa729f6772933194cc5fa54fee"