chore(deps): update dependency jetbrains.annotations to v2026

Author: renovate[bot]

ArchUnitNET/ArchUnitNET.csproj

@@ -21,7 +21,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="CycleDetection" Version="2.0.0" />
-    <PackageReference Include="JetBrains.Annotations" Version="2025.2.2" />
+    <PackageReference Include="JetBrains.Annotations" Version="2026.2.0" />
     <PackageReference Include="Mono.Cecil" Version="0.11.6" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
     <PackageReference Include="System.ValueTuple" Version="4.6.1" />