chore(deps): update dependency nunit3testadapter to 6.3.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
NUnit3TestAdapter (source)	6.2.0 → 6.3.0

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⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

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The artifact failure details are included below:

File name: src/VisualOn.FeatureIDE/packages.lock.json, test/VisualOn.FeatureIDE.Test/packages.lock.json

  Determining projects to restore...
/tmp/renovate/repos/github/visualon/featureide.net/src/VisualOn.FeatureIDE/VisualOn.FeatureIDE.csproj(47,5): error MSB3923: Failed to download file "https://repo.maven.apache.org/maven2/org/ow2/sat4j/org.ow2.sat4j.core/2.3.6/org.ow2.sat4j.core-2.3.6.jar".  Response status code does not indicate success: 429 (Too Many Requests).