Update block-registration.md (#23933)

* Update block-registration.md

Fixed the link to Block Transforms API page.

* Update docs/designers-developers/developers/block-api/block-registration.md

Co-authored-by: Marcus Kazmierczak <marcus@mkaz.com>

docs/designers-developers/developers/block-api/block-registration.md

@@ -270,7 +270,7 @@ variations: [
 
 -   **Type:** `Object`
 
-Transforms provide rules for what a block can be transformed from and what it can be transformed to. A block can be transformed from another block, a shortcode, a regular expression, a file or a raw DOM node. Take a look at the [Block Transforms API](./block-transforms.md) for more info about each available transformation.
+Transforms provide rules for what a block can be transformed from and what it can be transformed to. A block can be transformed from another block, a shortcode, a regular expression, a file or a raw DOM node. Take a look at the [Block Transforms API](/docs/designers-developers/developers/block-api/block-transforms.md) for more info about each available transformation.
 
 #### parent (optional)