chore(deps): bump idna from 3.13 to 3.15 in /contrib/dev_reqs (#11970)

* chore(deps): bump idna from 3.13 to 3.15 in /contrib/dev_reqs

Bumps [idna](https://github.com/kjd/idna) from 3.13 to 3.15.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.md)
- [Commits](https://github.com/kjd/idna/compare/v3.13...v3.15)

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

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

* fix style

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Matthias Mair <code@mjmair.com>

contrib/dev_reqs/requirements.txt

@@ -139,9 +139,9 @@ charset-normalizer==3.4.7 \
     # via
     #   -c src/backend/requirements.txt
     #   requests
-idna==3.13 \
-    --hash=sha256:585ea8fe5d69b9181ec1afba340451fba6ba764af97026f92a91d4eef164a242 \
-    --hash=sha256:892ea0cde124a99ce773decba204c5552b69c3c67ffd5f232eb7696135bc8bb3
+idna==3.15 \
+    --hash=sha256:048adeaf8c2d788c40fee287673ccaa74c24ffd8dcf09ffa555a2fbb59f10ac8 \
+    --hash=sha256:ca962446ea538f7092a95e057da437618e886f4d349216d2b1e294abfdb65fdc
     # via
     #   -c src/backend/requirements.txt
     #   requests