Docs: Fix broken URL on block variation page (#37702)

docs/reference-guides/block-api/block-variations.md

@@ -45,7 +45,7 @@ An object describing a variation defined for the block type can contain the foll
 -   `example` (optional, type `Object`) – Example provides structured data for the block preview. You can set to `undefined` to disable the preview shown for the block type.
 -   `scope` (optional, type `WPBlockVariationScope[]`) - the list of scopes where the variation is applicable. When not provided, it defaults to `block` and `inserter`. Available options:
     -   `inserter` - Block Variation is shown on the inserter.
-    -   `block` - Used by blocks to filter specific block variations. `Columns` and `Query Loop` blocks have such variations and are passed to the [experimental BlockVariationPicker](/packages/block-editor/src/components/block-variation-picker/README.md) component, which is handling the displaying of variations and the ability to select one from them.
+    -   `block` - Used by blocks to filter specific block variations. `Columns` and `Query Loop` blocks have such variations and are passed to the [experimental BlockVariationPicker](https://github.com/WordPress/gutenberg/blob/HEAD/packages/block-editor/src/components/block-variation-picker/README.md) component, which is handling the displaying of variations and the ability to select one from them.
     -   `transform` - Block Variation will be shown in the component for Block Variations transformations.
 -   `keywords` (optional, type `string[]`) - An array of terms (which can be translated) that help users discover the variation while searching.
 -   `isActive` (optional, type `Function|string[]`) - This can be a function or an array of block attributes. Function that accepts a block's attributes and the variation's attributes and determines if a variation is active. This function doesn't try to find a match dynamically based on all block's attributes, as in many cases some attributes are irrelevant. An example would be for `embed` block where we only care about `providerNameSlug` attribute's value. We can also use a `string[]` to tell which attributes should be compared as a shorthand. Each attributes will be matched and the variation will be active if all of them are matching.