[deps]: Update aws-sdk-net monorepo to v4

Author: renovate[bot]

src/KeyConnector/KeyConnector.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AWSSDK.KeyManagementService" Version="[3.7.2.6]"/>
+    <PackageReference Include="AWSSDK.KeyManagementService" Version="[4.0.12.4]"/>
     <PackageReference Include="Azure.Identity" Version="[1.11.4]"/>
     <PackageReference Include="Azure.Security.KeyVault.Certificates" Version="[4.5.1]"/>
     <PackageReference Include="Azure.Security.KeyVault.Keys" Version="[4.5.0]"/>