Merge pull request #11 from ernado-x/dependabot/nuget/JetBrains.Annotations-2023.3.0

Bump JetBrains.Annotations from 2021.3.0 to 2023.3.0

Author: ernado-x

src/X.Spectator/X.Spectator.csproj

@@ -21,7 +21,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="JetBrains.Annotations" Version="2021.3.0" />
+      <PackageReference Include="JetBrains.Annotations" Version="2023.3.0" />
       <PackageReference Include="System.Collections.Immutable" Version="8.0.0" />
     </ItemGroup>