Update protobuf to v4.29.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.protobuf:protobuf-kotlin-lite (source)	4.29.2 -> 4.29.3
com.google.protobuf:protobuf-javalite (source)	4.29.2 -> 4.29.3
com.google.protobuf:protoc (source)	4.29.2 -> 4.29.3

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