build(deps): bump fastify/github-action-merge-dependabot from 2.7.1 to 3

[Fdawgs]

Resolves https://github.com/fastify/env-schema/pull/101

Checklist

• [x] commit message and code follows the Developer's Certification of Origin and the Code of conduct

[coveralls]

Pull Request Test Coverage Report for Build 1782813415

• 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 92.771%

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Totals
Change from base Build 1771697462:	0.0%
Covered Lines:	50
Relevant Lines:	51

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 1777778410

• 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 92.771%

---

Totals
Change from base Build 1771697462:	0.0%
Covered Lines:	50
Relevant Lines:	51

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💛 - Coveralls