Typo

Closes #43
#43

GitOrigin-RevId: cf5c83e
Change-Id: Icc938e4bcdc317af2952cff61d76748dda9205b9
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/2060
Reviewed-by: Marcel van Lohuizen <mpvl@google.com>

doc/tutorial/basics/templates.md

@@ -7,7 +7,7 @@ _Types ~~and~~ are Values_
 <!-- jba: this is not in the spec, aside from the TemplateLabel grammar rule. -->
 
 One of CUE's most powerful features is templates.
-A template defines a value to be unified which each field of a struct.
+A template defines a value to be unified with each field of a struct.
 
 The template's identifier (in angular brackets) is bound to name of each
 of its sibling fields and is visible within the template value