fix(deps): update dependency mysql2 to v3.12.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mysql2 (source)	3.11.3 -> 3.12.0

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Release Notes

sidorares/node-mysql2 (mysql2)

v3.12.0

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Features

• PoolCluster: restoreNodeTimeout implementation (#​3218) (9a38601)

v3.11.5

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Bug Fixes

• 1040 datetime fields returned without time part when time is 00:00:00 (#​3204) (bded498)
• circular dependencies (#​3081) (d5a76e6)
• Deno v2 requires commonjs type explicitly (#​3209) (cdc9415)

v3.11.4

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Bug Fixes

• types: correct TypeCast's Next callback to return unknown (#​3129) (401db79)

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