Bump idna from 3.10 to 3.15 in /requirements

Bumps [idna](https://github.com/kjd/idna) from 3.10 to 3.15.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.md)
- [Commits](kjd/idna@v3.10...v3.15)

---
updated-dependencies:
- dependency-name: idna
  dependency-version: '3.15'
  dependency-type: indirect
...

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

Author: dependabot[bot]

requirements/requirements.txt

@@ -22,7 +22,7 @@ frozenlist==1.7.0
     # via
     #   aiohttp
     #   aiosignal
-idna==3.10
+idna==3.15
     # via yarl
 multidict==6.6.4
     # via

requirements/web.txt

@@ -18,7 +18,7 @@ h11==0.16.0
     # via uvicorn
 httptools==0.6.4
     # via uvicorn
-idna==3.10
+idna==3.15
     # via
     #   -c requirements.txt
     #   anyio