fix(deps): update dependency gatsby to v5.12.5

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
gatsby (source, changelog)	5.12.4 -> 5.12.5

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Release Notes

gatsbyjs/gatsby (gatsby)

### [`v5.12.5`](https://togithub.com/gatsbyjs/gatsby/compare/gatsby@5.12.4...gatsby@5.12.5) [Compare Source](https://togithub.com/gatsbyjs/gatsby/compare/gatsby@5.12.4...gatsby@5.12.5)

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