Bump numpy from 1.26.4 to 2.2.2

Bumps [numpy](https://github.com/numpy/numpy) from 1.26.4 to 2.2.2.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/RELEASE_WALKTHROUGH.rst)
- [Commits](numpy/numpy@v1.26.4...v2.2.2)

---
updated-dependencies:
- dependency-name: numpy
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

backend/requirements.txt

@@ -2,13 +2,13 @@ torch==2.5.1
 transformers[sentencepiece]==4.47.1
 sentence-transformers==3.3.1
 accelerate==1.2.1
-numpy==1.26.4
+numpy==2.2.2
 faiss-cpu==1.9.0.post1
 gensim==4.3.3
 scipy==1.13.1
 pandas==2.2.3
 diffusers==0.32.2
-numpy==1.26.4
+numpy==2.2.2
 joblib==1.4.2
 xgboost==2.1.1
 lightgbm==4.5.0