Some changes in README.

Author: Ulyanov-programmer

README.md

@@ -100,6 +100,10 @@ Does not transmit the original. <br>
 jpg_to_heif: {
   param: value,
 },
+// you can also optimize images without changing the extension
+jpg_to_jpg: {
+  param: value,
+},
 ```
 
 ### Supported format names: 
@@ -112,4 +116,4 @@ jpg_to_heif: {
 - `gif`
 
 ### If you find a bug, please create an issue [here](https://github.com/Ulyanov-programmer/gulp-sharp-optimize-images/issues).
-### If this project was useful to you, you can give it a ★ in [repository](https://github.com/Ulyanov-programmer/gulp-sharp-optimize-images).
+### If this project was useful to you, you can give it a ★ in [repository](https://github.com/Ulyanov-programmer/gulp-sharp-optimize-images).