Update README.md

Author: Kristan Kenney

README.md

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 [Hestia Control Panel](https://www.hestiacp.com/)
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 **Current stable release:** Version 1.0.6, released on September 26th, 2019.<br>
-**Current development release:** Version 1.1.0, release date yet to be determined.
+**Current development release:** Version 1.1.0, release candidate in final testing - to be released by end of March 10, 2020.
 
 **Welcome!**
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