DOC: outdated test suite output in installation guide

[mzeitlin11]

Pandas version checks

• I have checked that the issue still exists on the latest versions of the docs on main here

Location of the documentation

https://pandas.pydata.org/pandas-docs/stable/getting_started/install.html#running-the-test-suite

Documentation problem

The current output shown from pd.test() is outdated and was a source of confusion in #46498

Suggested fix for documentation

This output should be updated so that the results are more consistent with the current size of the test suite (and perhaps a note should be added to indicate that these results are just an example of what you might see, it shouldn't exactly match)