Fix swagger version in gobin call

Author: vbrown608

Makefile

@@ -20,4 +20,4 @@ test: ## Test the go code.
 	gobin -m -run github.com/kyoh86/richgo test -v $(CHECK_FILES)
 
 validate: deps ## Check that the swagger spec is valid.
-	gobin -m -run github.com/go-swagger/go-swagger/cmd/swagger@c49ea4ca2112a67af0faa06ffdc994b036860a0c validate $(SWAGGER_SPEC)
+	gobin -m -run github.com/go-swagger/go-swagger/cmd/swagger@v0.23.0 validate $(SWAGGER_SPEC)