Update twilio requirement from ~=8.3.0 to ~=8.4.0

Updates the requirements on [twilio](https://github.com/twilio/twilio-python) to permit the latest version.
- [Release notes](https://github.com/twilio/twilio-python/releases)
- [Changelog](https://github.com/twilio/twilio-python/blob/main/CHANGES.md)
- [Commits](https://github.com/twilio/twilio-python/compare/8.3.0...8.4.0)

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

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

requirements.txt

@@ -1,5 +1,5 @@
 opencv-python-headless==4.7.0.72
 pydub==0.25.1
 streamlit_webrtc==0.45.1
-twilio~=8.3.0
+twilio~=8.4.0
 matplotlib