docs: fix typos in example readme (#308)

examples/advanced/custom-transforms/README.md

@@ -1,6 +1,6 @@
-## Custom tranforms (and transformGroups)
+## Custom transforms (and transformGroups)
 
-This example shows how to use custom tranforms (and transformGroups) to apply custom "tranformations" to the properties when converted to design tokens.
+This example shows how to use custom transforms (and transformGroups) to apply custom "transformations" to the properties when converted to design tokens.
 
 Transforms are functions that transform a property (in a non-destructive way). The reason for *transforms* is that in this way each platform can consume the property in different ways (eg. changing *pixel* values to *pt* values for iOS, and *dp* or *sp* for Android).
 
@@ -81,7 +81,7 @@ Now open the `build.js` script and look at how these custom transforms/transform
 
 A few things to notice in the file:
 
-- the name of a custom "tranform" can be the same as an existing pre-defined method; in that case the pre-defined method is simply overwritten
+- the name of a custom "transform" can be the same as an existing pre-defined method; in that case the pre-defined method is simply overwritten
 - beyond the existing attributes, you can use custom attributes to create  **matcher** functions, used to filter the properties and apply the transform only to those that match the filter condition.
 - if you don't specify a **matcher**, the transformation will be applied to all the properties
 - the transformation can be applied not only to the **value** of a property, but also to its **name** (and also to its attributes)