docs: Fix typo in Merging Styles story name (#2732)

![image](https://github.com/Workday/canvas-kit/assets/2822954/750ddeff-db7a-46fb-a1a2-cc933b1d720c)

`Mergiing Styles` -> `Merging Styles`

[category:Documentation]

modules/styling/stories/MergingStyles.stories.mdx

@@ -3,7 +3,7 @@ import {SymbolDoc} from '@workday/canvas-kit-docs';
 import {CreateStencil} from './examples/CreateStencil';
 import {StylingOverrides} from './examples/StylingOverrides';
 
-<Meta title="Styling/Mergiing Styles" />
+<Meta title="Styling/Merging Styles" />
 
 ## Style Merging