Bump libse from 3.6.2 to 3.6.4
Bumps [libse](https://github.com/SubtitleEdit/subtitleedit) from 3.6.2 to 3.6.4.
- [Release notes](https://github.com/SubtitleEdit/subtitleedit/releases)
- [Changelog](https://github.com/SubtitleEdit/subtitleedit/blob/master/Changelog.txt)
- [Commits](https://github.com/SubtitleEdit/subtitleedit/compare/3.6.2...3.6.4)
---
updated-dependencies:
- dependency-name: libse
dependency-type: direct:production
update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>