chore(v4.3.x): release 4.3.4

[github-actions]

🤖 I have created a release beep boop

4.3.4 (2023-01-31)

Bug Fixes

• Add mux.js to support.html (#4923) (fde895e)
• DASH: Fix dynamic manifests from edgeware (#4914) (983dea3)
• Fix MediaCapabilities polyfill on Hisense (#4927) (d36677f)
• Fix WebVTT parser failure on REGION blocks (#4915) (f57a954)
• HLS: Fix detection of WebVTT subtitles in HLS by extension (#4928) (86c58ee), closes #4929
• HLS: IMSC1 subtitles not working in a HLS stream (#4942) (8a9156f)
• VTT: Fix combining style selectors (#4934) (bd04cf1)
• WebVTT: Add support to  , ‎ and ‏ (#4920) (d2e2d49)
• WebVTT: Add support to voice tag styles (#4845) (4fb19fb)
• WebVTT: Fix horizontal positioning with cue box size (#4949) (cefbe08)
• WebVTT: Fix voices with styles and support to multiple styles (#4922) (981bceb)

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[github-actions]

🤖 Release is at https://github.com/shaka-project/shaka-player/releases/tag/v4.3.4 🌻