Fix Hyperlink UIA Name including control type on Text page (#779)

The Hyperlink sample on the Text > Hyperlink page used 'Hyperlink' as its
visible text, so its UI Automation Name matched its LocalizedControlType,
violating WCAG/MAS 4.1.2 (Name, Role, Value). Change the link text to
'Microsoft' (its navigation target) so the Name is meaningful and no longer
repeats the control type. Also update the displayed XamlCode snippet to match.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: mmanolova-msft

Sample Applications/WPFGallery/Views/Text/HyperlinkPage.xaml

@@ -22,10 +22,10 @@
                     <controls:ControlExample
                         Margin="10"
                         HeaderText="A Hyperlink"
-                        XamlCode="&lt;TextBlock Margin=&quot;20&quot;&gt;&#10;    &lt;Hyperlink NavigateUri=&quot;https://www.microsoft.com&quot; RequestNavigate=&quot;Hyperlink_RequestNavigate&quot;&gt;&#10;        Lorem Ipsum link&#10;    &lt;/Hyperlink&gt;&#10;&lt;/TextBlock&gt;">
+                        XamlCode="&lt;TextBlock Margin=&quot;20&quot;&gt;&#10;                            &lt;Hyperlink NavigateUri=&quot;https://www.microsoft.com&quot; RequestNavigate=&quot;Hyperlink_RequestNavigate&quot;&gt;&#10;        Microsoft&#10;    &lt;/Hyperlink&gt;&#10;&lt;/TextBlock&gt;">
                         <TextBlock Margin="20">
                                 <Hyperlink NavigateUri="https://www.microsoft.com" RequestNavigate="Hyperlink_RequestNavigate">
-                                    Hyperlink
+                                    Microsoft
                                 </Hyperlink>
                         </TextBlock>
                     </controls:ControlExample>