Add description to region data source

[julienduchesne]

Changes proposed in this pull request:

• Adds the description given by the go sdk to the region data source. Corresponds to the region names given here: https://docs.aws.amazon.com/general/latest/gr/rande.html

Output from acceptance testing:

make testacc TESTARGS='-run=TestAccDataSourceAwsRegion'
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./... -v -run=TestAccDataSourceAwsRegion -timeout 120m
?       github.com/terraform-providers/terraform-provider-aws   [no test files]
=== RUN   TestAccDataSourceAwsRegion_basic
--- PASS: TestAccDataSourceAwsRegion_basic (9.52s)
=== RUN   TestAccDataSourceAwsRegion_endpoint
--- PASS: TestAccDataSourceAwsRegion_endpoint (12.29s)
=== RUN   TestAccDataSourceAwsRegion_endpointAndName
--- PASS: TestAccDataSourceAwsRegion_endpointAndName (18.11s)
=== RUN   TestAccDataSourceAwsRegion_name
--- PASS: TestAccDataSourceAwsRegion_name (12.92s)
PASS
ok      github.com/terraform-providers/terraform-provider-aws/aws       52.854s

[bflad]

Looks great, thanks @julienduchesne! 🚀

4 tests passed (all tests)
=== RUN   TestAccDataSourceAwsRegion_basic
--- PASS: TestAccDataSourceAwsRegion_basic (9.65s)
=== RUN   TestAccDataSourceAwsRegion_endpoint
--- PASS: TestAccDataSourceAwsRegion_endpoint (12.69s)
=== RUN   TestAccDataSourceAwsRegion_name
--- PASS: TestAccDataSourceAwsRegion_name (13.05s)
=== RUN   TestAccDataSourceAwsRegion_endpointAndName
--- PASS: TestAccDataSourceAwsRegion_endpointAndName (18.98s)

[bflad]

This has been released in version 1.27.0 of the AWS provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!