doc: fixed small errors

Closes #88
https://github.com/cuelang/cue/pull/88

GitOrigin-RevId: ea72847a3a1b0314372f3eb6746688716ff0100c
Change-Id: I4093e992283d4f28aa13274f63e9dbedcb32c091
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/3047
Reviewed-by: Marcel van Lohuizen <mpvl@google.com>
diff --git a/README.md b/README.md
index b885dc7..b937228 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@
 ### How?
 
 CUE merges the notion of schema and data.
-The same CUE defintion can simultaneously be used for validating data
+The same CUE definition can simultaneously be used for validating data
 and act as a template to reduce boilerplate.
 Schema definition is enriched with fine-grained value definitions
 and default values.