Bump tensorflow from 2.6.0 to 2.6.1 (#647)

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 2.6.0 to 2.6.1.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.6.0...v2.6.1)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Josh Izaac <josh146@gmail.com>

doc/requirements.txt

@@ -14,6 +14,6 @@ sphinx-autodoc-typehints==1.10.3
 sphinx-copybutton
 sphinx-automodapi
 sphinxcontrib-bibtex==0.4.2
-tensorflow==2.5.2
+tensorflow==2.6.1
 thewalrus>=0.16.0
 toml

requirements.txt

@@ -1,7 +1,7 @@
 numpy==1.19.2
 scipy==1.7.1
 sympy==1.8
-tensorflow==2.6.0
+tensorflow==2.6.1
 tensorboard==2.6.0
 typing-extensions==3.7.4
 networkx==2.6.3