Update mapstruct monorepo to v1.6.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.mapstruct:mapstruct-processor (source)	1.6.2 -> 1.6.3
org.mapstruct:mapstruct (source)	1.6.2 -> 1.6.3

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Release Notes

mapstruct/mapstruct (org.mapstruct:mapstruct-processor)

v1.6.3

Compare Source

Bugs

• Redundant if condition in Java record mapping with RETURN_DEFAULT strategy (#​3747)
• Stackoverflow with Immutables custom builder (#​3370)
• Unused import of java.time.LocalDate when mapping source LocalDateTime to target LocalDate (#​3732)

Documentation

• Add section to README.md comparing mapstruct with Java Records (#​3751)

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