Update av requirement from ~=13.1.0 to ~=14.0.1

Updates the requirements on [av](https://github.com/PyAV-Org/PyAV) to permit the latest version.
- [Release notes](https://github.com/PyAV-Org/PyAV/releases)
- [Changelog](https://github.com/PyAV-Org/PyAV/blob/main/CHANGELOG.rst)
- [Commits](PyAV-Org/PyAV@v13.1.0...v14.0.1)

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

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

requirements.txt

@@ -1,7 +1,7 @@
 aiolimiter~=1.2.1
 anyio~=4.6.2.post1
 apngasm_python~=1.3.1
-av~=13.1.0
+av~=14.0.1
 beautifulsoup4~=4.12.3
 rookiepy~=0.5.6
 httpx~=0.28.0