Revert "Update terraform version in workflow"
Revert "Update terraform version in workflow"

This reverts commit 3eb248bbf3856be9c5e3c3d0655d203aa778fdac.

alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf