build(deps): bump pillow-heif from 1.1.1 to 1.2.0

Bumps [pillow-heif](https://github.com/bigcat88/pillow_heif) from 1.1.1 to 1.2.0.
- [Release notes](https://github.com/bigcat88/pillow_heif/releases)
- [Changelog](https://github.com/bigcat88/pillow_heif/blob/master/CHANGELOG.md)
- [Commits](bigcat88/pillow_heif@v1.1.1...v1.2.0)

---
updated-dependencies:
- dependency-name: pillow-heif
  dependency-version: 1.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -4,5 +4,5 @@ xkcd==2.4.2
 pytz==2025.2
 asyncpg==0.30.0
 python-Levenshtein==0.27.1
-pillow-heif==1.1.1
+pillow-heif==1.2.0
 markdownify==1.2.2