Typo fix in 1.9-NOTES.md: compatability->compatibility
Typo fix in 1.9-NOTES.md: compatability->compatibility

compatability->compatibility
robinpercy/kops,tsupertramp/kops,blakebarnett/kops,blakebarnett/kops,tsupertramp/kops,kubernetes/kops,gambol99/kops,aledbf/kops,gambol99/kops,blakebarnett/kops,robinpercy/kops,robinpercy/kops,justinsb/kops,aledbf/kops,blakebarnett/kops,kubernetes/kops,gambol99/kops,justinsb/kops,justinsb/kops,aledbf/kops,aledbf/kops,tsupertramp/kops,kubernetes/kops,robinpercy/kops,gambol99/kops,tsupertramp/kops