Update dependency AWSSDK.S3 to 4.0.18.6 (#3006)

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

Author: dependencyupdates[bot]

src/CommandLine/NServiceBus.Transports.SQS.CommandLine.csproj

@@ -15,7 +15,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AWSSDK.S3" Version="4.0.18.5" />
+    <PackageReference Include="AWSSDK.S3" Version="4.0.18.6" />
     <PackageReference Include="AWSSDK.SimpleNotificationService" Version="4.0.2.16" />
     <PackageReference Include="AWSSDK.SQS" Version="4.0.2.14" />
     <PackageReference Include="BitFaster.Caching" Version="2.5.4" />

src/NServiceBus.Transport.SQS/NServiceBus.Transport.SQS.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AWSSDK.S3" Version="4.0.18.5" />
+    <PackageReference Include="AWSSDK.S3" Version="4.0.18.6" />
     <!-- Required for IAM Roles for Service Accounts even though no API is added -->
     <PackageReference Include="AWSSDK.SecurityToken" Version="4.0.5.9" />
     <PackageReference Include="AWSSDK.SimpleNotificationService" Version="4.0.2.16" />