Unpin matplotlib
The current PESummary release is constrained with matplotlib<3.8.0
because of GWpy, see !738 (merged). This should be unconstrained with an updated pin on GWpy.
The current PESummary release is constrained with matplotlib<3.8.0
because of GWpy, see !738 (merged). This should be unconstrained with an updated pin on GWpy.