Bump System.Text.Json from 6.0.4 to 8.0.4 in /src/JSONPatchTutorial.Serialization#1

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dependabot/nuget/src/JSONPatchTutorial.Serialization/System.Text.Json-8.0.4zielinski-piotr/JSONPatchTutorial:dependabot/nuget/src/JSONPatchTutorial.Serialization/System.Text.Json-8.0.4Copy head branch name to clipboard