Update starlette requirement from ~=0.13.6 to ~=0.14.2 in /src/front

Updates the requirements on [starlette](https://github.com/encode/starlette) to permit the latest version.
- [Release notes](https://github.com/encode/starlette/releases)
- [Changelog](https://github.com/encode/starlette/blob/master/docs/release-notes.md)
- [Commits](encode/starlette@0.13.6...0.14.2)

---
updated-dependencies:
- dependency-name: starlette
  dependency-type: direct:production
...

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

src/front/requirements.txt

@@ -5,5 +5,5 @@ python-multipart
 aiofiles
 azure-keyvault
 msal~=1.12.0
-starlette~=0.13.6
+starlette~=0.14.2
 azure-identity