Bump JetBrains.Annotations from 2023.3.0 to 2024.2.0 (#555)

Bumps JetBrains.Annotations from 2023.3.0 to 2024.2.0.


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</details>

Refresh.GameServer/Refresh.GameServer.csproj

@@ -46,7 +46,7 @@
         </Reference>
 
         <!-- Package references must match Bunkum.HttpServer's csproj -->
-        <PackageReference Include="JetBrains.Annotations" Version="2023.3.0" />
+        <PackageReference Include="JetBrains.Annotations" Version="2024.2.0" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
         <PackageReference Include="NotEnoughLogs" Version="2.0.3" />
     </ItemGroup>

RefreshTests.GameServer/RefreshTests.GameServer.csproj

@@ -43,7 +43,7 @@
         </Reference>
 
         <!-- Package references must match Bunkum.HttpServer's csproj -->
-        <PackageReference Include="JetBrains.Annotations" Version="2023.3.0" />
+        <PackageReference Include="JetBrains.Annotations" Version="2024.2.0" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
         <PackageReference Include="NotEnoughLogs" Version="2.0.3" />