fix(dynamic icons): update role for Sa11y tests (#5046)

Author: kflournoy-sf

RELEASENOTES.md

@@ -4,6 +4,11 @@
 ## Release 2.19.0 - April 12, 2022
 
 ## Components
+
+### [Dynamic Icons](https://www.lightningdesignsystem.com/components/dynamic-icons)
+#### Changed
+- Updated Global Action Help icon's `role` attribute from `presentation` to `img` for better accessibility compliance
+
 ### [Global Navigation](https://www.lightningdesignsystem.com/components/global-navigation)
 #### Added
 - Added `role="img"` to unread indicator dot to comply with accessibility usage rules for `aria-label`

ui/components/dynamic-icons/RELEASENOTES.md

@@ -6,6 +6,11 @@
 
 <!-- ## [VERSION] -->
 
+## 2.19.0
+
+### Changed
+- Updated Global Action Help icon's `role` attribute from `presentation` to `img` for better accessibility compliance
+
 ## 2.17.0
 
 ### Changed

ui/components/dynamic-icons/global-action-help/index.jsx

@@ -7,7 +7,7 @@ let GlobalActionHelp = () => (
       xmlns="http://www.w3.org/2000/svg"
       viewBox="0 -12 78.5 110"
       aria-labelledby="title"
-      role="presentation"
+      role="img"
     >
       <defs>
         <mask id="questionMark" x="0" y="0" width="78.5" height="110">