build(deps): bump transformers from 5.8.1 to 5.12.0

Bumps [transformers](https://github.com/huggingface/transformers) from 5.8.1 to 5.12.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](huggingface/transformers@v5.8.1...v5.12.0)

---
updated-dependencies:
- dependency-name: transformers
  dependency-version: 5.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -21,7 +21,7 @@ dependencies = [
     "google-api-core>=2.0.0",
     "posthog>=3.0.0",
     "packaging>=25.0",
-    "transformers==5.8.1",
+    "transformers==5.12.0",
     "protobuf>=3.20.0",
     "sentencepiece>=0.1.99",
     "ollama>=0.6.1",