chore(deps): bump postcss and @angular-devkit/build-angular

Bumps [postcss](https://github.com/postcss/postcss) to 8.5.12 and updates ancestor dependency [@angular-devkit/build-angular](https://github.com/angular/angular-cli). These dependencies need to be updated together.


Updates `postcss` from 8.5.6 to 8.5.12
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.6...8.5.12)

Updates `@angular-devkit/build-angular` from 20.3.24 to 20.3.25
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@v20.3.24...v20.3.25)

---
updated-dependencies:
- dependency-name: "@angular-devkit/build-angular"
  dependency-version: 20.3.25
  dependency-type: direct:development
- dependency-name: postcss
  dependency-version: 8.5.12
  dependency-type: indirect
...

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

Author: dependabot[bot]

package-lock.json

@@ -61,7 +61,7 @@
     "@analogjs/vite-plugin-angular": "2.4.10",
     "@analogjs/vitest-angular": "2.4.10",
     "@angular-builders/custom-esbuild": "20.0.0",
-    "@angular-devkit/build-angular": "20.3.24",
+    "@angular-devkit/build-angular": "20.3.25",
     "@angular-devkit/core": "20.3.24",
     "@angular-devkit/schematics": "20.3.24",
     "@angular-eslint/eslint-plugin": "20.6.0",