build(deps): bump idna from 3.4 to 3.7 in /server-example

Bumps [idna](https://github.com/kjd/idna) from 3.4 to 3.7.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v3.4...v3.7)

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

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

server-example/requirements.txt

@@ -4,7 +4,7 @@ click==8.1.3
 cmake==3.26.1
 filelock==3.11.0
 Flask==2.3.2
-idna==3.4
+idna==3.7
 itsdangerous==2.1.2
 Jinja2==3.1.3
 lit==16.0.0