Log Message:
www/ruby-aws-sigv4: update to 1.5.1

1.5.0 (2022-04-20)

* Feature - Use CRT based signers if aws-crt is available - provides support
  for sigv4a.

1.5.1 (2022-07-19)

* Issue - Fix performance regression when checking if aws-crt is
  available. (#2729)