Bump AWSSDK.S3 from 4.0.19.4 to 4.0.20.3 (#963)

---
updated-dependencies:
- dependency-name: AWSSDK.S3
  dependency-version: 4.0.20.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

ServiceMonitor.AWS/ServiceMonitor.AWS.csproj

@@ -9,7 +9,7 @@
     <PackageReference Include="AWSSDK.EC2" Version="4.0.82.2" />
     <PackageReference Include="AWSSDK.ECR" Version="4.0.12.6" />
     <PackageReference Include="AWSSDK.Lambda" Version="4.0.13.7" />
-    <PackageReference Include="AWSSDK.S3" Version="4.0.19.4" />
+    <PackageReference Include="AWSSDK.S3" Version="4.0.20.3" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.2" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.2" />
   </ItemGroup>