Continuous integration: documentation generation failure due to mismatched reference function name

[jayaddison]

Describe the bug
As spotted by @TBBle, the 'build documentation' continuous integration step has been failing with an AttributeError; a mismatched function name in the reference documentation is the cause.

To Reproduce

1. Observe the build output in continuous integration after commit afc8c32 pending a fix (note that this currently only runs following documentation-related edits)

Expected behavior

1. The documentation build should succeed

Environment (please complete the following information):
Continuous Integration via GitHub Actions

Does this bug also happen on master? To answer this, you have two options:
Yes