Merge pull request kubernetes#1469 from dims/fix-title-for-20190130-node-os-arch-labels.md

fix title for 20190130-node-os-arch-labels.md

Author: k8s-ci-robot

keps/sig-node/20190130-node-os-arch-labels.md

@@ -1,5 +1,5 @@
 ---
-title: TBD
+title: Promote Node Operating System & Architecture labels to GA
 authors:
   - "@yujuhong"
 owning-sig: sig-node