Update checklists/designer-checklist.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: janmaarten-a11y

checklists/designer-checklist.md

@@ -37,7 +37,7 @@ Use it side by side as you develop products to make sure you’ve accounted for
 - [ ] **Headings are annotated and used in a consecutive order.**
 	- Heading levels should be sequential. Don’t skip levels (i.e. `<h2>` to `<h4>`)
 	- Nested headings are encouraged and natural as content goes from more general to specific.
-	- In certain cases, headings may be visually hidden. Levels and visual styling may deviate from one another (i.e. giving an `<h2>` the same visual treatment of an `<h3>`). Please consult the a11y design team in this case.
+	- In certain cases, headings may be visually hidden. Levels and visual styling may deviate from one another (i.e. giving an `<h2>` the same visual treatment as an `<h3>`). Please consult the a11y design team in this case.
 - [ ] **Landmarks are identified and annotated** 
 	- Page has only one main section and one footer section.  
 	- Leave out landmark identifiers when giving a unique name. e.g., use "Repository" instead of "Repository navigation". This prevents redundancy in screen readers that already read out the navigation landmark.