Update module github.com/aws/aws-sdk-go to v1.40.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/aws/aws-sdk-go	require	minor	v1.39.6 -> v1.40.0

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Release Notes

aws/aws-sdk-go

### [`v1.40.0`](https://togithub.com/aws/aws-sdk-go/blob/master/CHANGELOG.md#Release-v1400-2021-07-14) [Compare Source](https://togithub.com/aws/aws-sdk-go/compare/v1.39.6...v1.40.0) \=== ##### Service Client Updates - `service/acm`: Updates service API and documentation - Added support for RSA 3072 SSL certificate import - `service/dms`: Updates service API and documentation - Release of feature needed for ECA-Endpoint settings. This allows customer to delete a field in endpoint settings by using --exact-settings flag in modify-endpoint api. This also displays default values for certain required fields of endpoint settings in describe-endpoint-settings api. - `service/glue`: Updates service API and documentation - Add support for Event Driven Workflows - `service/healthlake`: Updates service API, documentation, and paginators - `service/lightsail`: Updates service API and documentation - This release adds support for the Amazon Lightsail object storage service, which allows you to create buckets and store objects. - `service/wellarchitected`: Updates service API and documentation ##### SDK Features - `aws/session`: Support has been added for EC2 IPv6-enabled Instance Metadata Service Endpoints ([#​4006](https://togithub.com/aws/aws-sdk-go/pull/4006)) - Adds support for `AWS_EC2_METADATA_SERVICE_ENDPOINT_MODE` environment variable which may specify `IPv6` or `IPv4` for selecting the desired endpoint. - Adds support for `ec2_metadata_service_endpoint_mode` AWS profile key, which may specify `IPv6` or `IPv4` for selecting the desired endpoint. Has lower precedence then `AWS_EC2_METADATA_SERVICE_ENDPOINT`. - Adds support for `ec2_metadata_service_endpoint` AWS profile key, which may specify an explicit endpoint URI. Has higher precedence then `ec2_metadata_service_endpoint_mode`. - `aws/endpoints`: Supported has been added for EC2 IPv6-enabled Instance Metadata Service Endpoints ([#​4006](https://togithub.com/aws/aws-sdk-go/pull/4006))

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