www/ruby-aws-sdk-kms: update to 1.70.0

pkgsrc chnage: update dependency.

1.70.0 (2023-07-06)

* Feature - Code Generated Changes, see ./build_tools or aws-sdk-core's
  CHANGELOG.md for details.

1.69.0 (2023-07-05)

* Feature - Added Dry Run Feature to cryptographic and cross-account
  mutating KMS APIs (14 in all).  This feature allows users to test their
  permissions and parameters before making the actual API call.

1.68.0 (2023-06-28)

* Feature - Code Generated Changes, see ./build_tools or aws-sdk-core's
  CHANGELOG.md for details.

(taca)