Change SettingsTab close icon to be smaller (#9324)

We were using the wrong close icon for the settings tab. This is a side effect of `TerminalTab` overriding `TabBase`'s implementation.

#6800 - Settings UI Epic

Closes #9317

(cherry picked from commit 4a95341)

src/cascadia/TerminalApp/TabBase.cpp

@@ -49,7 +49,7 @@ namespace winrt::TerminalApp::implementation
         Controls::MenuFlyoutItem closeTabMenuItem;
         Controls::FontIcon closeSymbol;
         closeSymbol.FontFamily(Media::FontFamily{ L"Segoe MDL2 Assets" });
-        closeSymbol.Glyph(L"\xE8BB");
+        closeSymbol.Glyph(L"\xE711");
 
         closeTabMenuItem.Click([weakThis](auto&&, auto&&) {
             if (auto tab{ weakThis.get() })