Bump spacy from 3.8.11 to 3.8.15

Bumps [spacy](https://github.com/explosion/spaCy) from 3.8.11 to 3.8.15.
- [Release notes](https://github.com/explosion/spaCy/releases)
- [Changelog](https://github.com/explosion/spaCy/blob/master/RELEASE_NOTES.md)
- [Commits](https://github.com/explosion/spaCy/compare/release-v3.8.11...release-v3.8.15)

---
updated-dependencies:
- dependency-name: spacy
  dependency-version: 3.8.15
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -14,7 +14,7 @@ tomlkit==0.15.0
 Flask==3.1.1
 clean-text==0.6.0
 unidecode==1.4.0
-spacy==3.8.11
+spacy==3.8.15
 torch==2.9.1
 transformers==4.52.4
 ffmpeg-python==0.2.0