Bump postcss from 8.2.15 to 8.4.31 in /frontend

Bumps [postcss](https://github.com/postcss/postcss) from 8.2.15 to 8.4.31.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.2.15...8.4.31)

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

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

frontend/yarn.lock

@@ -855,13 +855,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"colorette@npm:^1.2.2":
-  version: 1.2.2
-  resolution: "colorette@npm:1.2.2"
-  checksum: 69fec14ddaedd0f5b00e4bae40dc4bc61f7050ebdc82983a595d6fd64e650b9dc3c033fff378775683138e992e0ddd8717ac7c7cec4d089679dcfbe3cd921b04
-  languageName: node
-  linkType: hard
-
 "combined-stream@npm:^1.0.8":
   version: 1.0.8
   resolution: "combined-stream@npm:1.0.8"
@@ -2112,15 +2105,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"nanoid@npm:^3.1.23":
-  version: 3.1.23
-  resolution: "nanoid@npm:3.1.23"
-  bin:
-    nanoid: bin/nanoid.cjs
-  checksum: 8fa8dc3283a4fa159700a36cb22f61197547c8155831cb74f1b9c51fbc29ea80c136fd91001468d147a31d3a77f884958aec6c1beabac903c89780acacca9327
-  languageName: node
-  linkType: hard
-
 "nanoid@npm:^3.3.6":
   version: 3.3.6
   resolution: "nanoid@npm:3.3.6"
@@ -2323,25 +2307,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:^8.1.10":
-  version: 8.2.15
-  resolution: "postcss@npm:8.2.15"
-  dependencies:
-    colorette: ^1.2.2
-    nanoid: ^3.1.23
-    source-map: ^0.6.1
-  checksum: 07c309e5318843cdbb240b19101c8c679e19cb88544811de921dd9125118d6c0603afe925da7f2ac928dd7d4c0c6380ccdedf032400af5013210a3f145baca5d
-  languageName: node
-  linkType: hard
-
-"postcss@npm:^8.4.27":
-  version: 8.4.28
-  resolution: "postcss@npm:8.4.28"
+"postcss@npm:^8.1.10, postcss@npm:^8.4.27":
+  version: 8.4.31
+  resolution: "postcss@npm:8.4.31"
   dependencies:
     nanoid: ^3.3.6
     picocolors: ^1.0.0
     source-map-js: ^1.0.2
-  checksum: f605c24a36f7e400bad379735fbfc893ccb8d293ad6d419bb824db77cdcb69f43d614ef35f9f7091f32ca588d130ec60dbcf53b366e6bf88a8a64bbeb3c05f6d
+  checksum: 1d8611341b073143ad90486fcdfeab49edd243377b1f51834dc4f6d028e82ce5190e4f11bb2633276864503654fb7cab28e67abdc0fbf9d1f88cad4a0ff0beea
   languageName: node
   linkType: hard
 
@@ -2587,13 +2560,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"source-map@npm:^0.6.1":
-  version: 0.6.1
-  resolution: "source-map@npm:0.6.1"
-  checksum: 59ce8640cf3f3124f64ac289012c2b8bd377c238e316fb323ea22fbfe83da07d81e000071d7242cad7a23cd91c7de98e4df8830ec3f133cb6133a5f6e9f67bc2
-  languageName: node
-  linkType: hard
-
 "ssri@npm:^10.0.0":
   version: 10.0.5
   resolution: "ssri@npm:10.0.5"
@@ -2724,11 +2690,11 @@ __metadata:
 
 "typescript@patch:typescript@^5.2.2#~builtin<compat/typescript>":
   version: 5.2.2
-  resolution: "typescript@patch:typescript@npm%3A5.2.2#~builtin<compat/typescript>::version=5.2.2&hash=85af82"
+  resolution: "typescript@patch:typescript@npm%3A5.2.2#~builtin<compat/typescript>::version=5.2.2&hash=f3b441"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: 07106822b4305de3f22835cbba949a2b35451cad50888759b6818421290ff95d522b38ef7919e70fb381c5fe9c1c643d7dea22c8b31652a717ddbd57b7f4d554
+  checksum: 0f4da2f15e6f1245e49db15801dbee52f2bbfb267e1c39225afdab5afee1a72839cd86000e65ee9d7e4dfaff12239d28beaf5ee431357fcced15fb08583d72ca
   languageName: node
   linkType: hard