Bump @tailwindcss/postcss from 4.1.4 to 4.1.5 in /src/Elastic.Markdown (#1210)

Bumps [@tailwindcss/postcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/@tailwindcss-postcss) from 4.1.4 to 4.1.5.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.1.5/packages/@tailwindcss-postcss)

---
updated-dependencies:
- dependency-name: "@tailwindcss/postcss"
  dependency-version: 4.1.5
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

src/Elastic.Markdown/package-lock.json

@@ -28,7 +28,7 @@
   "private": true,
   "devDependencies": {
     "@eslint/js": "9.25.1",
-    "@tailwindcss/postcss": "4.1.4",
+    "@tailwindcss/postcss": "4.1.5",
     "@trivago/prettier-plugin-sort-imports": "5.2.2",
     "eslint": "9.25.1",
     "globals": "16.0.0",