Fix spelling in _data/mgems.yml

Author: jbampton

_data/mgems.yml

@@ -305,7 +305,7 @@
   repository: https://github.com/matsumotory/mruby-correlation.git
   repooptions: 
 - name: mruby-crc
-  description: Configurable general CRC calcurator for mruby
+  description: Configurable general CRC calculator for mruby
   author: dearblue
   website: https://github.com/dearblue/mruby-crc
   protocol: git