MAINT: Bump sphinx-gallery from 0.14.0 to 0.15.0 (#204) #941

Job	Run time
Code style	1m 1s
Documentation Style Check	13s
Documentation	1m 20s
Build and Smoke tests (ubuntu-latest, 3.8, false)	21s
Build and Smoke tests (ubuntu-latest, 3.9, false)	21s
Build and Smoke tests (ubuntu-latest, 3.10, false)	28s
Build and Smoke tests (ubuntu-latest, 3.11, false)	24s
Build and Smoke tests (windows-latest, 3.8, false)	1m 41s
Build and Smoke tests (windows-latest, 3.9, false)	1m 46s
Build and Smoke tests (windows-latest, 3.10, false)	1m 25s
Build and Smoke tests (windows-latest, 3.11, false)	1m 34s
Tests and coverage (3.8)	1m 18s
Tests and coverage (3.9)	1m 19s
Tests and coverage (3.10)	1m 25s
Tests and coverage (3.11)	1m 18s
Package library	24s
Release project	0s
Upload dev documentation	24s
Upload release documentation	0s
	16m 42s

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