Bump tensorflow from 2.9.0 to 2.9.1

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 2.9.0 to 2.9.1.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/v2.9.1/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.9.0...v2.9.1)

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

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

requirements-dl.txt

@@ -1,2 +1,2 @@
-tensorflow==2.9.0
+tensorflow==2.9.1
 torch==1.11.0