Merge pull request linode#338 from g1bl3t/lke-changelog-1.15.1

Add LKE Changelog for v1.15.1

Author: bbiggerr

src/content/changelog/lke-1-15-1.md

@@ -0,0 +1,23 @@
+---
+title: Linode Kubernetes Engine v1.15.1
+date: 2021-02-24T05:00:00.000Z
+version: 1.15.1
+changelog:
+  - Linode Kubernetes Engine
+---
+
+### Changed
+
+* Upgrade cluster control plane components to latest available patch version:
+  v1.18.16 and v1.19.8
+* Upgrade coredns on all LKE clusters to v1.8.0
+* Upgrade CCM for LKE clusters to v0.3.12, which allows for inter-service
+  communication from within cluster via external LB and removes support for
+  deprecated `tls` and `protocol` annotations
+* Update all Kubernetes worker node disk images to their latest patch
+  versions: v1.19.8 and v1.18.16. Please recycle your nodes to
+  receive the latest updates
+* Update all Kubernetes worker node disk images to include new packages:
+  open-iscsi for longhorn support and lvm2 for rook support. Please recycle
+  your nodes to receive the latest updates.
+