follow-up to commit 200b248(Update README.md)

follow-up to commit 200b2487c2dfb1a5160c0974d2b7c6f2e54719ee

Update release date in another place

README.md

@@ -2,7 +2,7 @@
 <img align="top" width=175 src="Documentation/Logo/Marlin%20Logo%20GitHub.png" />
  Additional documentation can be found in [The Marlin Wiki](https://github.com/MarlinFirmware/Marlin/wiki/Main-Page).
 
-## Release Candidate -- Marlin 1.1.0-RC4 - 24 March 2016
+## Release Candidate -- Marlin 1.1.0-RC5 - 01 April 2016
 
 __Not for production use – use with caution!__