Ctrl+I produces warning with Sphinx 4

Description

What steps will reproduce the problem?

I just clicked on Ctrl+i while cursor on the numpy flipud function.

Traceback

/home/dejan/anaconda3/lib/python3.9/site-packages/sphinx/ext/jsmath.py:24: RemovedInSphinx40Warning: sphinx.ext.jsmath has been moved to sphinxcontrib-jsmath.
  warnings.warn('sphinx.ext.jsmath has been moved to sphinxcontrib-jsmath.',

Versions

• Spyder version: 5.0.0
• Python version: 3.9.0
• Qt version: 5.12.9
• PyQt5 version: 5.12.3
• Operating System: Linux 4.15.0-140-generic

Dependencies

# Mandatory:
atomicwrites >=1.2.0          :  1.4.0 (OK)
chardet >=2.0.0               :  4.0.0 (OK)
cloudpickle >=0.5.0           :  1.6.0 (OK)
cookiecutter >=1.6.0          :  1.7.2 (OK)
diff_match_patch >=20181111   :  20200713 (OK)
intervaltree >=3.0.2          :  3.1.0 (OK)
IPython >=7.6.0               :  7.22.0 (OK)
jedi =0.17.2                  :  0.17.2 (OK)
jsonschema >=3.2.0            :  3.2.0 (OK)
keyring >=17.0.0              :  23.0.1 (OK)
nbconvert >=4.0               :  6.0.7 (OK)
numpydoc >=0.6.0              :  1.1.0 (OK)
parso =0.7.0                  :  0.7.0 (OK)
pexpect >=4.4.0               :  4.8.0 (OK)
pickleshare >=0.4             :  0.7.5 (OK)
psutil >=5.3                  :  5.8.0 (OK)
pygments >=2.0                :  2.8.1 (OK)
pylint >=1.0                  :  2.7.4 (OK)
pyls >=0.36.2;<1.0.0          :  0.36.2 (OK)
pyls_black >=0.4.6            :  0.4.6 (OK)
pyls_spyder >=0.3.2           :  0.3.2 (OK)
qdarkstyle =3.0.2             :  3.0.2 (OK)
qstylizer >=0.1.10            :  0.1.10 (OK)
qtawesome >=0.5.7             :  1.0.2 (OK)
qtconsole >=5.0.3             :  5.0.3 (OK)
qtpy >=1.5.0                  :  1.9.0 (OK)
rtree >=0.8.3                 :  0.9.7 (OK)
setuptools >=39.0.0           :  52.0.0.post20210125 (OK)
sphinx >=0.6.6                :  3.5.3 (OK)
spyder_kernels >=2.0.1,<2.1.0 :  2.0.1 (NOK)
textdistance >=4.2.0          :  4.2.1 (OK)
three_merge >=0.1.1           :  0.1.1 (OK)
watchdog >=0.10.3;<2.0.0      :  1.0.2 (OK)
xdg >=0.26                    :  0.27 (OK)
zmq >=17                      :  22.0.3 (OK)

# Optional:
cython >=0.21                 :  None (NOK)
matplotlib >=2.0.0            :  3.4.1 (OK)
numpy >=1.7                   :  1.20.2 (OK)
pandas >=1.1.1                :  1.2.3 (OK)
scipy >=0.17.0                :  1.6.2 (OK)
sympy >=0.7.3                 :  None (NOK)

[ccordoba12]

Thanks @mrclary and @dalthviz for your help.

[dalthviz]

Testing with the installer generated at https://github.com/spyder-ide/spyder/pull/15627 Ctrl + I works for me on Windows @ccordoba12