Update mkdocs-material to 5.1.5

[pyup-bot]

This PR updates mkdocs-material from 5.1.4 to 5.1.5.

Changelog

5.1.5

* Added name attribute for social links to set link title
* Fixed 1623: Allow arbitrary links in social links
* Fixed 1664: Height of iframe is not adjustable
* Fixed 1667: Sidebars are scrolled to bottom on load (bug in Chrome 81+)

Links

• PyPI: https://pypi.org/project/mkdocs-material
• Changelog: https://pyup.io/changelogs/mkdocs-material/
• Repo: https://squidfunk.github.io/mkdocs-material/

[coveralls]

Pull Request Test Coverage Report for Build 763

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 99.248%

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Totals
Change from base Build 760:	0.0%
Covered Lines:	1584
Relevant Lines:	1596

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💛 - Coveralls

[pyup-bot]

Closing this in favor of #121