[MNT] [Dependabot](deps): Update sphinx-gallery requirement from <0.18.0 to <0.19.0

[dependabot[bot]]

Updates the requirements on sphinx-gallery to permit the latest version.

Release notes

Sourced from sphinx-gallery's releases.

Release v0.18.0

Full Changelog

Implemented enhancements:

• Allow to disable writing computation times #1385 (bmwiedemann)
• [ENH] Add option to render multiple images from same cell as single-img #1384 (tsbinns)

Fixed bugs:

• Fix indexst variable does not exist when own index gallery is first #1383 (lucyleeow)

Project maintenance

• [pre-commit.ci] pre-commit autoupdate #1387 (pre-commit-ci[bot])
• Bump mamba-org/setup-micromamba from 1 to 2 in the actions group #1386 (dependabot[bot])
• [pre-commit.ci] pre-commit autoupdate #1380 (pre-commit-ci[bot])
• [pre-commit.ci] pre-commit autoupdate #1379 (pre-commit-ci[bot])
• [pre-commit.ci] pre-commit autoupdate #1378 (pre-commit-ci[bot])
• [pre-commit.ci] pre-commit autoupdate #1377 (pre-commit-ci[bot])
• [pre-commit.ci] pre-commit autoupdate #1376 (pre-commit-ci[bot])
• [pre-commit.ci] pre-commit autoupdate #1375 (pre-commit-ci[bot])
• [pre-commit.ci] pre-commit autoupdate #1373 (pre-commit-ci[bot])
• [pre-commit.ci] pre-commit autoupdate #1372 (pre-commit-ci[bot])

Commits

• e4d5124 Release 0.18.0 (#1388)
• e7b7603 [ENH] Add option to render multiple images from same cell as single-img (#1384)
• 840f3a1 [pre-commit.ci] pre-commit autoupdate (#1387)
• d0fed09 Allow to disable writing computation times (#1385)
• 3fb207e Bump mamba-org/setup-micromamba from 1 to 2 in the actions group (#1386)
• a44edd8 Fix indexst variable does not exist when own index gallery is first (#1383)
• 7ddaf92 [pre-commit.ci] pre-commit autoupdate (#1380)
• a3a8de1 [pre-commit.ci] pre-commit autoupdate (#1379)
• 04b9646 [pre-commit.ci] pre-commit autoupdate (#1378)
• c52e9e9 [pre-commit.ci] pre-commit autoupdate (#1377)
• Additional commits viewable in compare view

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