Confusing typo in the heredoc of the Series.replace method

[scur-iolus]

Checks

• I have checked that this issue has not already been reported.
• I have confirmed this bug exists on the latest version of Polars.

Issue description

There is a typo in the Python documentation on this page regarding the old argument:

Also accepts a mapping of values to their replacement as syntactic sugar for replace(new=Series(mapping.keys()), old=Series(mapping.values())).

In this short code sample, new and old have been mistakenly switched (see also the example provided).

This should be easy to fix!

Expected behavior

Instead, it should be:

Also accepts a mapping of values to their replacement as syntactic sugar for replace(old=Series(mapping.keys()), new=Series(mapping.values())).

Installed versions

--------Version info---------
Polars:               0.20.15
Index type:           UInt32
Platform:             Linux-5.15.0-100-generic-x86_64-with-glibc2.31
Python:               3.11.8 (main, Feb 25 2024, 16:41:26) [GCC 9.4.0]

----Optional dependencies----
adbc_driver_manager:  <not installed>
cloudpickle:          <not installed>
connectorx:           <not installed>
deltalake:            <not installed>
fastexcel:            <not installed>
fsspec:               <not installed>
gevent:               <not installed>
hvplot:               <not installed>
matplotlib:           3.8.3
numpy:                1.26.4
openpyxl:             3.1.2
pandas:               2.2.0
pyarrow:              15.0.0
pydantic:             <not installed>
pyiceberg:            <not installed>
pyxlsb:               <not installed>
sqlalchemy:           <not installed>
xlsx2csv:             <not installed>
xlsxwriter:           <not installed>

[mcrumiller]

Good catch, thanks!