Update dependency mkdocs-material to v8.5.9

This MR contains the following updates:

Package	Update	Change
mkdocs-material	patch	8.5.8 -> 8.5.9
mkdocs-material	patch	==8.5.8 -> ==8.5.9

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Release Notes

squidfunk/mkdocs-material

v8.5.9

Compare Source

• Fixed #​4600: Illegible links for black/white primary colors (8.5.8 regression)
• Fixed #​4594: Need to set schema to change link color

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