Describe the bug

Several colormaps are paired with the wrong names.

CARTA:

Matplotlib (expected):

Reference: https://matplotlib.org/stable/users/explain/colors/colormaps.html#miscellaneous

The colormaps for gnuplot and gnuplot2 do not match Matplotlib's versions.
Additionally, PuBu and PuBuGn are also mismatched, though they do not appear in the currently selected list.

To Reproduce
Steps to reproduce the behavior:

1. Click Colormap in Render Configuration
2. Scroll down to gnuplot and gnuplot2
3. See the incorrect colormap–name pairing

Expected behavior
The gnuplot and gnuplot2 colormaps should match the versions provided by Matplotlib.

Platform info (please complete the following information):

• OS [e.g. macOS Monterey]: macOS Sequoia
• Browser [e.g. chrome, safari, electron app]: chrome
• Browser version [e.g. 22]:
• Backend branch [e.g. dev, v3b2 release]: v5.0.3
• Frontend branch [e.g. dev, v3b2 release]: v5.0.3