build(deps): update typing-extensions requirement

Updates the requirements on [typing-extensions](https://github.com/python/typing_extensions) to permit the latest version.
- [Release notes](https://github.com/python/typing_extensions/releases)
- [Changelog](https://github.com/python/typing_extensions/blob/main/CHANGELOG.md)
- [Commits](python/typing_extensions@4.11.0...4.12.1)

---
updated-dependencies:
- dependency-name: typing-extensions
  dependency-type: direct:production
...

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

docs/requirements.txt

@@ -11,5 +11,5 @@ pyparsedvd~=0.0.3
 pytimeconv~=0.0.2
 requests_toolbelt~=1.0.0
 rich~=13.7.1
-typing-extensions~=4.11.0
+typing-extensions~=4.12.1
 numpy~=1.26.4

requirements.txt

@@ -11,5 +11,5 @@ pytimeconv~=0.0.2
 requests~=2.31.0
 requests_toolbelt~=1.0.0
 rich~=13.7.1
-typing-extensions~=4.11.0
+typing-extensions~=4.12.1
 VapourSynth>=65