chore: Update versions to latest stable

UI/WindowingSamples/src/Directory.Build.props

@@ -14,9 +14,9 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <UnoExtensionsVersion>4.1.14</UnoExtensionsVersion>
+    <UnoExtensionsVersion>4.1.21</UnoExtensionsVersion>
     <UnoToolkitVersion>6.0.18</UnoToolkitVersion>
     <UnoThemesVersion>5.0.13</UnoThemesVersion>
-    <UnoCSharpMarkupVersion>5.2.13</UnoCSharpMarkupVersion>
+    <UnoCSharpMarkupVersion>5.2.14</UnoCSharpMarkupVersion>
   </PropertyGroup>
 </Project>

UI/WindowingSamples/src/global.json

@@ -1,6 +1,6 @@
 {
   // To update the version of Uno please update the version of the Uno.Sdk here. See https://aka.platform.uno/upgrade-uno-packages for more information.
   "msbuild-sdks": {
-    "Uno.Sdk": "5.2.108"
+    "Uno.Sdk": "5.2.121"
   }
 }