Fix typo

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

gocognit.go

@@ -20,7 +20,7 @@ type Stat struct {
 	Diagnostics []Diagnostic `json:",omitempty"`
 }
 
-// Diagnostic contrains information how the complexity increase.
+// Diagnostic contains information how the complexity increase.
 type Diagnostic struct {
 	Inc     int
 	Nesting int `json:",omitempty"`