Bump postcss from 8.5.15 to 8.5.23 in /frontend

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.15 to 8.5.23.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.5.15...8.5.23)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.23
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

frontend/package.json

@@ -54,7 +54,7 @@
 		"@types/react-table": "^7.7.20",
 		"@vitejs/plugin-react": "^6.0.2",
 		"happy-dom": "^20.9.0",
-		"postcss": "^8.5.15",
+		"postcss": "^8.5.23",
 		"postcss-simple-vars": "^7.0.1",
 		"sass": "^1.100.0",
 		"tmp": "^0.2.7",

frontend/yarn.lock

@@ -1967,10 +1967,10 @@ ms@^2.1.3:
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.3.tgz#574c8138ce1d2b5861f0b44579dbadd60c6615b2"
   integrity sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==
 
-nanoid@^3.3.12:
-  version "3.3.12"
-  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.12.tgz#ab3d912e217a6d0a514f00a72a16543a28982c05"
-  integrity sha512-ZB9RH/39qpq5Vu6Y+NmUaFhQR6pp+M2Xt76XBnEwDaGcVAqhlvxrl3B2bKS5D3NH3QR76v3aSrKaF/Kiy7lEtQ==
+nanoid@^3.3.16:
+  version "3.3.18"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.18.tgz#f66a2de1199ffde0fcf21c8a5f13106b1c081913"
+  integrity sha512-DTg4MJbGMWkfi6VZFdNt2/caMbQy4Ou+Op/hJQvGEWcnVfoA1QA+xzRKAzw9jD6+GVOOeYr/mIcuDSdug6F6+w==
 
 node-addon-api@^7.0.0:
   version "7.1.1"
@@ -2077,12 +2077,12 @@ postcss-simple-vars@^7.0.1:
   resolved "https://registry.yarnpkg.com/postcss-simple-vars/-/postcss-simple-vars-7.0.1.tgz#836b3097a54dcd13dbd3c36a5dbdd512fad2954c"
   integrity sha512-5GLLXaS8qmzHMOjVxqkk1TZPf1jMqesiI7qLhnlyERalG0sMbHIbJqrcnrpmZdKCLglHnRHoEBB61RtGTsj++A==
 
-postcss@^8.5.15:
-  version "8.5.15"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.15.tgz#d1eaf677a324e9ec02196da2d3fecf4a0b9a735c"
-  integrity sha512-FfR8sjd4em2T6fb3I2MwAJU7HWVMr9zba+enmQeeWFfCbm+UOC/0X4DS8XtpUTMwWMGbjKYP7xjfNekzyGmB3A==
+postcss@^8.5.15, postcss@^8.5.23:
+  version "8.5.23"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.23.tgz#3493550116f478487298301d2c2e8dc5a56e6594"
+  integrity sha512-g50586zr4bZmwFiTlflMu8E0bDTb5I5gertgwAKmsdUlTQIhZtunzUlD1WSzwcVWPoAVpsrA6vlfCD7oXvRwgg==
   dependencies:
-    nanoid "^3.3.12"
+    nanoid "^3.3.16"
     picocolors "^1.1.1"
     source-map-js "^1.2.1"