Minor grammatical correction in README (#1206)

README.md

@@ -385,7 +385,7 @@ func main() {
 	r := gin.New()
 
 	// Global middleware
-	// Logger middleware will write the logs to gin.DefaultWriter even you set with GIN_MODE=release.
+	// Logger middleware will write the logs to gin.DefaultWriter even if you set with GIN_MODE=release.
 	// By default gin.DefaultWriter = os.Stdout
 	r.Use(gin.Logger())