Bump book/external/sphinx-iframes from 062c54a to e21273d

Bumps [book/external/sphinx-iframes](https://github.com/TeachBooks/sphinx-iframes) from `062c54a` to `e21273d`.
- [Release notes](https://github.com/TeachBooks/sphinx-iframes/releases)
- [Commits](062c54a679...e21273da13)

---
updated-dependencies:
- dependency-name: book/external/sphinx-iframes
  dependency-version: e21273da134cbf4753da5faf9adc277b8f1c3a1c
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
This commit is contained in:
dependabot[bot] 2025-04-30 11:36:18 +00:00 • committed by GitHub
parent b0c9f6c22e
commit a9ade696a8
No known key found for this signature in database
GPG key ID: B5690EEEBB952194

@ -1 +1 @@
Subproject commit 062c54a679c6dd44b948549498e755c7c5df1d73
Subproject commit e21273da134cbf4753da5faf9adc277b8f1c3a1c