reword ungrouping in docs

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

@@ -341,7 +341,7 @@ transforms: {
 
 Via the optional `transforms` key of the block configuration, blocks can use the `ungroup` subkey to define the blocks that will replace the block being processed. These new blocks will usually be a subset of the existing inner blocks, but could also include new blocks.
 
-If a block has an `ungroup` transform, it is considered ungroupable, without the requirement of being the default grouping block. The UI used to ungroup a block with this API is the same as the one used for the default grouping block. In order for the Ungroup button to be displayed, we must have a single grouping block selected, which also contains some inner blocks.
+If a block has an `ungroup` transform, it is eligible for ungrouping, without the requirement of being the default grouping block. The UI used to ungroup a block with this API is the same as the one used for the default grouping block. In order for the Ungroup button to be displayed, we must have a single grouping block selected, which also contains some inner blocks.
 
 **ungroup** is a callback function that receives the attributes and inner blocks of the block being processed. It should return an array of block objects.