Bump scipy from 1.6.1 to 1.11.1 in /docs/src

Bumps [scipy](https://github.com/scipy/scipy) from 1.6.1 to 1.11.1.
- [Release notes](https://github.com/scipy/scipy/releases)
- [Commits](scipy/scipy@v1.6.1...v1.11.1)

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

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

Author: dependabot[bot]

docs/src/requirements.txt

@@ -15,7 +15,7 @@ pint==0.16.1; python_version >= "3.6"
 pyparsing==2.4.7; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.6"
 python-dateutil==2.8.1; python_full_version >= "3.6.1" and python_version >= "3.6"
 pytz==2021.1; python_full_version >= "3.6.1" and python_version >= "3.6"
-scipy==1.6.1; python_version >= "3.7"
+scipy==1.11.1; python_version >= "3.7"
 six==1.16.0; python_full_version >= "3.6.1" and python_version >= "3.6"
 typing-extensions==3.10.0.0; python_version < "3.8" and python_version >= "3.6"
 uncertainties==3.1.5