Bump tensorflow from ad6d8cc to a108b9f

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from `ad6d8cc` to `a108b9f`.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Commits](tensorflow/tensorflow@ad6d8cc...a108b9f)

---
updated-dependencies:
- dependency-name: tensorflow
  dependency-type: direct:production
...

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