Update dependency gatsby to v5.16.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
gatsby (source, changelog)	5.16.0 → 5.16.1

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Release Notes

gatsbyjs/gatsby (gatsby)

v5.16.1

Compare Source

What's Changed

• Fix various regressions with Gatsby Head API, such as <title> not updating document.title by @​serhalp and @​pieh in #​39382

Full Changelog: https://github.com/gatsbyjs/gatsby/compare/gatsby@5.16.0...gatsby@5.16.1

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