Bump the npm_and_yarn group across 1 directory with 2 updates

Bumps the npm_and_yarn group with 2 updates in the /nginx directory: [sanitize-html](https://github.com/apostrophecms/sanitize-html) and [postcss](https://github.com/postcss/postcss).


Updates `sanitize-html` from 2.10.0 to 2.12.1
- [Changelog](https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md)
- [Commits](apostrophecms/sanitize-html@2.10.0...2.12.1)

Updates `postcss` from 8.4.21 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@8.4.21...8.4.38)

---
updated-dependencies:
- dependency-name: sanitize-html
  dependency-type: direct:development
  dependency-group: npm_and_yarn-security-group
- dependency-name: postcss
  dependency-type: indirect
  dependency-group: npm_and_yarn-security-group
...

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

nginx/package.json

@@ -7,6 +7,6 @@
         "buffer": "^6.0.3",
         "esbuild": "^0.17.14",
         "file-type": "^18.2.1",
-        "sanitize-html": "^2.5.1"
+        "sanitize-html": "^2.12.1"
     }
 }