PacWave clusters plot has flipped axes labels

[jtgrasb]

Describe the bug:

In the PacWave resource characterization example, the axes labels on the sea state representative clusters plot are flipped.

To Reproduce:

PacWave Resource Characterization

Minimal working example: N/A

Expected behavior:

x-axis should be period, y-axis should be height

Screenshots:

Desktop (please complete the following information):

• OS: N/A
• MHKiT Version: 0.8.1

Additional context:

N/A