Bump tensorflow from 2.18.1 to 2.19.0

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 2.18.1 to 2.19.0.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.18.1...v2.19.0)

---
updated-dependencies:
- dependency-name: tensorflow
  dependency-version: 2.19.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,3 +1,3 @@
-tensorflow==2.18.1
+tensorflow==2.19.0
 Flask==3.1.1
 numpy==2.2.4