Bump JetBrains.Annotations package

Author: drewnoakes

src/Directory.Build.props

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="JetBrains.Annotations" Version="2021.3.0" PrivateAssets="All" />
+    <PackageReference Include="JetBrains.Annotations" Version="2022.3.1" PrivateAssets="All" />
   </ItemGroup>
 
   <!-- Workaround for https://github.com/dotnet/sourcelink/issues/572 -->