updated readme.md

Author: ANKUR DWIVEDI

README.md

@@ -226,7 +226,7 @@ https://ik.imagekit.io/your_imagekit_id/tr:h-300,w-400/default-image.jpg?p1=123&
 
 ImageKit.io enables you to apply overlays to [images](https://docs.imagekit.io/features/image-transformations/overlay-using-layers) and [videos](https://docs.imagekit.io/features/video-transformation/overlay) using the raw parameter with the concept of [layers](https://docs.imagekit.io/features/image-transformations/overlay-using-layers#layers). The raw parameter facilitates incorporating transformations directly in the URL. A layer is a distinct type of transformation that allows you to define an asset to serve as an overlay, along with its positioning and additional transformations.
 
-### Text as overlays
+***Text as overlays***
 
 You can add any text string over a base video or image using a text layer (l-text).
 
@@ -247,8 +247,7 @@ image_url = imagekit.url({
 ```
 https://ik.imagekit.io/your_imagekit_id/tr:h-300,w-400,l-text,i-Imagekit,fs-50,l-end/default-image.jpg
 ```
-
-### Image as overlays
+***Image as overlays***
 
 You can add an image over a base video or image using an image layer (l-image).
 
@@ -270,7 +269,7 @@ image_url = imagekit.url({
 https://ik.imagekit.io/your_imagekit_id/tr:h-300,w-400,l-image,i-default-image.jpg,w-100,b-10_CDDC39,l-end/default-image.jpg
 ```
 
-### Solid color blocks as overlays
+***Solid color blocks as overlays***
 
 You can add solid color blocks over a base video or image using an image layer (l-image).