[🔥AUDIT🔥] Typo fix (#100)

🖍 _This is an audit!_ 🖍

Auditors: StevenACoffman

Author: benjaminjkraft

Required Reviewers: 

Approved By: 

Checks: ✅ Test (1.17), ✅ Test (1.16), ✅ Test (1.15), ✅ Test (1.14), ✅ Lint, ✅ Test (1.17), ✅ Test (1.16), ✅ Test (1.15), ✅ Test (1.14), ✅ Lint

Pull Request URL: https://github.com/Khan/genqlient/pull/100

generate/names.go

@@ -31,7 +31,7 @@ package generate
 // different types.
 //
 // One subtlety in the above description is: is the "MyType" the interface or
-// the impelmentation?  When it's a suffix, the answer is both: we generate
+// the implementation?  When it's a suffix, the answer is both: we generate
 // both MyFieldMyInterface and MyFieldMyImplementation, and the latter, in Go,
 // implements the former.  (See docs/DESIGN.md for more.)  But as an infix, we
 // use the type on which the field is requested.  Concretely, the following