Bump sphinxcontrib-programoutput from 0.17 to 0.18

Bumps [sphinxcontrib-programoutput](https://github.com/NextThought/sphinxcontrib-programoutput) from 0.17 to 0.18.
- [Changelog](https://github.com/OpenNTI/sphinxcontrib-programoutput/blob/master/CHANGES.rst)
- [Commits](OpenNTI/sphinxcontrib-programoutput@0.17...0.18)

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

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

requirements/docs.txt

@@ -9,7 +9,7 @@ sphinx-issues==5.0.0
 sphinxext-opengraph==0.9.1
 sphinx-sitemap==2.5.1
 sphinx-paramlinks==0.6.0
-sphinxcontrib-programoutput==0.17
+sphinxcontrib-programoutput==0.18
 # For credentials recipe
 botocore
 cachetools