remove trailing period

Signed-off-by: Steve Coffman <steve@khanacademy.org>

plugin/resolvergen/resolver.go

@@ -155,7 +155,7 @@ func (m *Plugin) generatePerSchema(data *codegen.Data) error {
 			FileNotice: `
 				// This file will be automatically regenerated based on the schema, any resolver implementations
 				// will be copied through when generating and any unknown code will be moved to the end.
-				// Code generated by github.com/99designs/gqlgen version ` + graphql.Version + `.`,
+				// Code generated by github.com/99designs/gqlgen version ` + graphql.Version,
 			Filename: filename,
 			Data:     resolverBuild,
 			Packages: data.Config.Packages,