build(deps): Bump AWSSDK.IdentityManagement (#433)

Bumps [AWSSDK.IdentityManagement](https://github.com/aws/aws-sdk-net) from 3.7.402.20 to 3.7.402.21.
- [Changelog](https://github.com/aws/aws-sdk-net/blob/main/SDK.CHANGELOG.MD)
- [Commits](https://github.com/aws/aws-sdk-net/commits)

---
updated-dependencies:
- dependency-name: AWSSDK.IdentityManagement
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

AWSIntegrator/AWSIntegrator.csproj

@@ -8,7 +8,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="AWSSDK.IdentityManagement" Version="3.7.402.20" />
+      <PackageReference Include="AWSSDK.IdentityManagement" Version="3.7.402.21" />
     </ItemGroup>
 
 </Project>