Bump tensorflow from 2.16.1 to 2.18.0

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 2.16.1 to 2.18.0.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.16.1...v2.18.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -4,7 +4,7 @@ pandas==2.2.3
 multihist==0.6.5
 wimprates==0.5.0
 tqdm==4.67.1
-tensorflow==2.16.1
+tensorflow==2.18.0
 tensorflow_probability==0.24.0
 tf-keras==2.16.0
 iminuit==2.30.1