Update module github.com/google/go-cmp to v0.5.6

This MR contains the following updates:

Package	Type	Update	Change
github.com/google/go-cmp	require	patch	v0.5.5 -> v0.5.6

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Release Notes

google/go-cmp

v0.5.6

Compare Source

Reporter changes:

• (#​258) Print as text if mostly text
• (#​259) Cleanup edit groups after coalescing
• (#​260) Avoid diffing by lines if inefficient

Minor documentation changes:

• (#​256) Fix typo in path.go

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changed title from Update module google/go-cmp to v0.5.6 to Update module github.com/google/go-cmp to v0.5.6

changed the description

merged

mentioned in commit 68c31f38