Revert shotcut to 24.08.29

[tonejito]

Revert the changes from #185387 to bump back shortcut from 24.09.13 to 24.08.29.

The shotcut software has an issue on the 24.09.13 release and the DMG binary does not have that version number:

• https://github.com/mltframework/shotcut/releases/tag/v24.09.13

The DMG binary should be shotcut-macos-240913.dmg, but it was overwritten as shotcut-macos-240919.dmg (240913 was overwritten to 240919)

The 24.09.19 version is currently marked as pre-release, so the checks fail because it is not "stable".

• https://github.com/mltframework/shotcut/releases/tag/v24.09.19

This issue has been reported to the upstream repository, but the maintainer stated that it might get fixed in homebrew, rather than upstream.

• Updating or installing through Homebrew gives 404 mltframework/shotcut#1583

There were efforts to manually patch the Cask file to allow for this situation to be handled. However, the PRs were closed for a variety of reasons and the CI checks were not passing.

• bumped shotcut version to 24.09.19 #186672
• shotcut 24.09.19 #186553
• shotcut 24.09.19 #186487

This PR is an attempt to revert the changes created on #185387 and fall back to the last version that passed the checks.

This might not be he ideal solution, but we can create another PR to update to the next stable branch where the version numbers match after things have settled.

• https://github.com/mltframework/shotcut/releases

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Fixes:

• Can't install shotcut #186969