Update dependency AWSSDK.SecurityToken to 4.0.5.9 (#1148)

Co-authored-by: dependencyupdates[bot] <218638057+dependencyupdates[bot]@users.noreply.github.com>

Author: dependencyupdates[bot]

src/Directory.Packages.props

@@ -5,7 +5,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="AWSSDK.CloudWatch" Version="4.0.6.6" />
-    <PackageVersion Include="AWSSDK.SecurityToken" Version="4.0.5.8" />
+    <PackageVersion Include="AWSSDK.SecurityToken" Version="4.0.5.9" />
     <PackageVersion Include="AWSSDK.SQS" Version="4.0.2.13" />
     <PackageVersion Include="Azure.Identity" Version="1.17.0" />
     <PackageVersion Include="Azure.Messaging.ServiceBus" Version="7.20.1" />