Bump numpydoc from 1.2.1 to 1.3.1 (#35)

Bumps [numpydoc](https://github.com/numpy/numpydoc) from 1.2.1 to 1.3.1.
- [Release notes](https://github.com/numpy/numpydoc/releases)
- [Changelog](https://github.com/numpy/numpydoc/blob/main/doc/release_notes.rst)
- [Commits](numpy/numpydoc@v1.2.1...v1.3.1)

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

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

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

Author: dependabot[bot]

requirements_docs.txt

@@ -1,3 +1,3 @@
 Sphinx==4.5.0
-numpydoc==1.2.1
+numpydoc==1.3.1
 sphinx-copybutton==0.5.0