chore(v4.12.x): release 4.12.6

[shaka-bot]

🤖 I have created a release beep boop

4.12.6 (2025-01-06)

Bug Fixes

• Avoid useless MSE reset when transmuxing muxed content (#7818) (6723a7d)
• Docs: Remove info about small/large gaps from manual (#7762) (9e2c508)
• Don't ignore the license server in manifest when another key-system has license server in configuration (#7797) (f6f665f)
• Fix change timestampOffset on discontinuities when not necessary (#7823) (360c590)
• Fix ClearKey license on old CDMs (#7816) (77379b0)
• Fix gaps produced by the transmuxer (#7822) (5ad2121)
• Follow the configured playRange for src= (#7825) (3f413d9)
• HLS: Correctly identify webvtt subtitles with cmft extension (#7791) (0305383)
• HLS: Disable audio/video correctly when loading a TS media playlist (#7815) (1cd1ed7)
• HLS: Do not use EXT-X-PROGRAM-DATE-TIME on vod when there is only video or audio (#7802) (7a57011)
• HLS: Fix timestamp offset for raw formats when using segments mode (#7819) (cd8f761)
• Offline: Allow storage of MSS streams (#7799) (a7591a0)
• re-open the MediaSource if readyState is not open when the init() method is called. (#7783) (b63466d)
• Remove useless calls to isTypeSupported (#7817) (2ffcdac)
• Remove useless deprecation in UITextDisplayer and add some guards in SimpleTextDisplayer (#7805) (5252c8d)
• Transmuxer: Fix transmuxer with overflow data (video nalus and aac samples) between PES (#7813) (fcddae1)
• UI: Allow 1x playback rate when default playback rate is not x1 (#7787) (0d43964)
• UI: Video starts playing automatically when selecting a playback rate (#7786) (33373de)

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This PR was generated with Release Please. See documentation.

[shaka-bot]

Incremental code coverage: 100.00%

[joeyparrish]

@shaka-bot please test

[shaka-bot]

@joeyparrish: Lab tests started with arguments:

• pr=7832

[shaka-bot]

🤖 Release is at https://github.com/shaka-project/shaka-player/releases/tag/v4.12.6 🌻