Updated Sparkplug spec document to v2.2

Signed-off-by: Ilya Binshtok <ilya.binshtok@cirrus-link.com>
diff --git a/spec/Sparkplug Topic Namespace and State ManagementV2.2-with appendix B format - Eclipse.pdf b/spec/Sparkplug Topic Namespace and State ManagementV2.2-with appendix B format - Eclipse.pdf
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diff --git a/spec/Sparkplug+Topic+Namespace+and+State+ManagementV2.1+Apendix++Payload+B+format.pdf b/spec/Sparkplug+Topic+Namespace+and+State+ManagementV2.1+Apendix++Payload+B+format.pdf
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