Bump numpy from 1.19.2 to 1.22.0 in /doc

Bumps [numpy](https://github.com/numpy/numpy) from 1.19.2 to 1.22.0.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/HOWTO_RELEASE.rst)
- [Commits](numpy/numpy@v1.19.2...v1.22.0)

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

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

doc/requirements.txt

@@ -7,7 +7,7 @@ m2r2==0.3.1
 mistune==0.8.4
 numba==0.53.1
 networkx==2.6.3
-numpy==1.19.2
+numpy==1.22.0
 plotly==4.4.1
 protobuf<4.21.0  # remove when fix is released
 quantum-blackbird==0.4.0