Excavator: Bump go dependency github.com/palantir/go-githubapp

[svc-excavator-bot]

excavator is a bot for automating changes across repositories.

Changes produced by the go/bump-go-dependencies-oss check.

Go Dependency Updates

Module	From Version	To Version	Direct/Indirect	Target
github.com/google/go-github/v79	New	v79.0.0	Indirect
github.com/palantir/go-githubapp	v0.38.2	v0.39.0	Direct	✓

Pruned Dependencies

Module	From Version	To Version	Target
github.com/google/go-github/v72	v72.0.0	Removed

Legend:

• Direct/Indirect: Shows whether the dependency is direct or indirect in go.mod
• New: Newly added dependency (wasn't in go.mod before)
• Removed: Dependency that was removed from go.mod
• Target: ✓ = The dependency specified in the update instruction
• Pruned Dependencies: Dependencies that were pruned from go.mod but may be relevant for downstream dependencies (all pruned dependencies are indirect)

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