Merge pull request #838 from mboersma/update-v2.16-changelog

docs(changelogs): add builder release and workflow commit

Author: mboersma

src/changelogs/v2.16.0.md

@@ -2,6 +2,7 @@
 
 #### Releases
 
+- builder v2.11.0 -> v2.12.0
 - controller v2.15.0 -> v2.16.0
 - monitor v2.10.0 -> v2.10.1
 - slugrunner v2.3.0 -> v2.3.1
@@ -37,6 +38,7 @@
 - [`b456870`](https://github.com/deis/workflow/commit/b4568706a37b33de33a1fe61ee6040d978fb095a) (workflow) - installing-workflow: helm init upgrade note (#819)
 - [`61a5cca`](https://github.com/deis/workflow/commit/61a5cca8b08f50eb08c2f3f1b1324babe8f8d26d) (workflow) - chart-provenance.md: fix chart repo name (#830)
 - [`2a7f756`](https://github.com/deis/workflow/commit/2a7f756f883107a0dcc7e0e8aee9d74bb9914f36) (workflow) - *: specify Helm v2.5.0 or later
+- [`ef4bc3e`](https://github.com/deis/workflow/commit/ef4bc3eae925558107cb269e5f8b09338a469ee2) (workflow) - *: updates/changelog for v2.16.0 release
 
 #### Maintenance