build(deps-dev): bump tailwindcss in /apps/OpenSign

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss) from 3.4.14 to 3.4.15.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/v3.4.15/CHANGELOG.md)
- [Commits](tailwindlabs/tailwindcss@v3.4.14...v3.4.15)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

apps/OpenSign/package-lock.json

@@ -116,7 +116,7 @@
     "postcss": "^8.4.49",
     "prettier": "^3.3.3",
     "pretty-quick": "^4.0.0",
-    "tailwindcss": "^3.4.14",
+    "tailwindcss": "^3.4.15",
     "terser-webpack-plugin": "^5.3.10",
     "webpack-cli": "^5.1.4"
   },