RTSDK-5552: Update to README for 2.0.2.E1

Author: vlevendel

Cpp-C/CHANGELOG.md

@@ -19,12 +19,13 @@ FULL CHANGELOG
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-RTSDK C++/C Release 2.0.2.E1 (Sep 9, 2021)
+RTSDK C++/C Release 2.0.2.E1 (Sep 23, 2021)
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 ETA C 3.6.2.E1 Issues Resolved
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 - [RTSDK-5539] - Race condition from closed tunnelstream resulting in unhandled state in tunnelstream provider 
+- [RTSDK-5599] - pReactorChannelImpl->tunnelDispatchEventQueued is not unset resulting in tunnel events not being dispatched 
 
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 RTSDK C++/C Release 2.0.2.G2 (Aug 11, 2021)