add: Canons of Dort

references/cd/CD2-Art6.md

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+# The Second Main Point of Doctrine
+## Christ’s Death and Human Redemption through It
+
+### Article 6: Unbelief Man’s Responsibility
+
+However, that many who have been called through the gospel do not repent or believe in Christ but perish in unbelief is not because the sacrifice of Christ offered on the cross is deficient or insufficient, but because they themselves are at fault.