Update RELEASE.md

RELEASE.md

@@ -5,13 +5,12 @@ v0.6.0 (2018-04-04)
 ------
 1. Change mace header interfaces, only including necessary methods.
 
+v0.6.3 (2018-05-21)
+------
+1. support `float` data_type when running in gpu
 
 v0.7.0 (2018-05-18)
 ------
 1. Change interface that report error type
 2. Improve cpu performace
 3. Merge cpu/gpu engine to one
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-
-v0.6.3 (2018-05-21)
-------
-1. support `float` data_type when running in gpu
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