BUG: Documentation build fails due to type cross-reference

[michaelcdevin]

Describe the bug
Newer versions of sphinx return the following warning for all public methods in wecopttool.pto:

C:\code\WecOptTool\docs\source\api_docs\wecopttool.pto.PTO.acceleration.rst:2: WARNING: more than one target found for cross-reference 'WEC': wecopttool.WEC, wecopttool.core.WEC [ref.python]`

This warning is causing GitHub Actions documentation build to fail

Possibly related to sphinx-doc/sphinx#4961, though this issue is ~6 years old, and the problem with WecOptTool has only appeared recently.

To Reproduce
Run python docs/build_docs.py locally from the WecOptTool root with Sphinx >=7.0

Expected behavior
WecOptTool documentation builds successfully

Observed behavior
Build outputs many warnings similar to above, which aborts the documentation build

System:

• OS: Windows 11
• Python version: 3.11.9
• WecOptTool version: 3.0.1
• Any other relevant package version: Sphinx >= 7.0