Repository: microsoft/terminal (language: cpp)

Issue:
[About Dialog]: 'About' text which is visually appearing as heading is not defined in heading.
### Windows Terminal version

1.12.2931.0

### Windows build number

10.0.22504.1010

### Other Software

Test Environment:
OS: Windows 11 Version Dev (OS Build 22504.1010)
App: Windows Terminal Preview
Screen Reader: Narrator
Tool: Accessibility Insights for Windows Version 1.1.1741.1

### Steps to reproduce

**Repro Steps:**
1. Open Windows Terminal.
2. Open Narrator using 'Win + Ctrl + Enter' key and ensure Scan mode is ON.(Turn on Scan on mode using 'Caps lock + Space' keys).
3. Inside About page, Navigate through heading using shortcut key 'H' or 'Shift + H'.
4. Observe the issue.

**User Experience:**
Screen Reader users will be impacted here as there UX is not good visual structure is not conveyed to them.

**Guideline Reference:**
https://www.w3.org/WAI/WCAG21/Understanding/info-and-relationships

**Attachments:**
['About' text which is visually appearing as heading is not defined in heading..zip](https://github.com/microsoft/terminal/files/7692851/About.text.which.is.visually.appearing.as.heading.is.not.defined.in.heading.zip)


### Expected Behavior
'About' text which is visually appearing as heading should be defined as Heading Level 1.

### Actual Behavior

'About' text which is visually appearing as heading is not defined in heading.


Discussion / hints:

Fix patch:
diff --git a/src/cascadia/TerminalApp/AboutDialog.xaml b/src/cascadia/TerminalApp/AboutDialog.xaml
index 901bb5bfd87..780966cfff4 100644
--- a/src/cascadia/TerminalApp/AboutDialog.xaml
+++ b/src/cascadia/TerminalApp/AboutDialog.xaml
@@ -17,7 +17,8 @@
 
     <StackPanel Orientation="Vertical">
         <TextBlock IsTextSelectionEnabled="True">
-            <Run Text="{x:Bind ApplicationDisplayName}" /> <LineBreak />
+            <Run AutomationProperties.HeadingLevel="1"
+                 Text="{x:Bind ApplicationDisplayName}" /> <LineBreak />
             <Run x:Uid="AboutDialog_VersionLabel" />
             <Run Text="{x:Bind ApplicationVersion}" />
         </TextBlock>


Test patch: