Update jetbrains to v2026 (#2409)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Directory.Packages.props

@@ -23,7 +23,7 @@
     <GlobalPackageReference Include="JetBrains.ExternalAnnotations" Version="10.2.169" />
   </ItemGroup>
   <ItemGroup>
-    <PackageVersion Include="JetBrains.Annotations.Sources" Version="2025.2.4" />
+    <PackageVersion Include="JetBrains.Annotations.Sources" Version="2026.2.0" />
     <PackageVersion Include="JetBrains.dotCover.CommandLineTools" Version="2026.1.3" />
     <PackageVersion Include="JetBrains.ReSharper.GlobalTools" Version="2026.1.3" />
     <PackageVersion Include="Aspire.Hosting" Version="13.1.2" />