MAINT: Bump ansys-sphinx-theme from 0.12.5 to 0.13.0 #954

Job	Run time
Code style	49s
Documentation Style Check	17s
Documentation	1m 29s
Build and Smoke tests (ubuntu-latest, 3.8, false)	20s
Build and Smoke tests (ubuntu-latest, 3.9, false)	18s
Build and Smoke tests (ubuntu-latest, 3.10, false)	15s
Build and Smoke tests (ubuntu-latest, 3.11, false)	25s
Build and Smoke tests (windows-latest, 3.8, false)	1m 3s
Build and Smoke tests (windows-latest, 3.9, false)	1m 56s
Build and Smoke tests (windows-latest, 3.10, false)	1m 22s
Build and Smoke tests (windows-latest, 3.11, false)	1m 25s
Tests and coverage (3.8)	1m 22s
Tests and coverage (3.9)	1m 25s
Tests and coverage (3.10)	1m 31s
Tests and coverage (3.11)	1m 28s
Package library	22s
Release project	0s
Upload dev documentation	0s
Upload release documentation	0s
	15m 47s

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