fix(deps): update dependency com.uber.nullaway:nullaway to v0.12.6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.uber.nullaway:nullaway	0.12.4 -> 0.12.6

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Release Notes

uber/NullAway (com.uber.nullaway:nullaway)

v0.12.6

• JSpecify: view type as super in generic method inference (#​1177)
• Infer @​Nullable type arguments for type variables from unmarked code (#​1181)
• Convert android-jar.py to Python 3 (#​1175)
• Suggest castToNonNull fix for unboxing error (#​1182)

v0.12.5

• Add missing override to RestoreNullnessAnnotationsVisitor (#​1154)
• Add more bailouts for raw types (#​1153)
• Do unboxing check for invocation parameters even when calling a @​NullUnmarked method (#​1163)
• JSpecify: infer generic method type arguments for assignments (#​1131)
• JSpecify: properly handle lambdas in anonymous inner classes (#​1165)
• Support @​MonotonicNonNull on static fields (#​1166)
• Update to Error Prone 2.37.0 (#​1169)
• Use proper name for constructors in JarInfer (#​1167)
• Don't treat @​ParametricNullness as @​Nullable in JSpecify mode (#​1174)

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