chore: Fix go version in tests (#45)

Author: osterman

test/src/go.mod

@@ -1,8 +1,8 @@
 module github.com/cloudposse/terraform-aws-ecs-cloudwatch-autoscaling
 
-go 1.21
+go 1.24
 
-toolchain go1.21.4
+toolchain go1.24.0
 
 require (
 	github.com/gruntwork-io/terratest v0.46.16