[DOCS] Updates changelog for 6.6.0 (#366)

Author: lcawl

docs/CHANGELOG.asciidoc

@@ -28,7 +28,7 @@
 
 //=== Regressions
 
- == {es} version 6.6.0
+== {es} version 6.6.0
 
 === Breaking Changes
 
@@ -40,18 +40,21 @@
 
 === Bug Fixes
 
-Fix cause of "Sample out of bounds" error message (See {ml-pull}355[355].}
+Fix cause of "Sample out of bounds" error message. {ml-pull}335[#335]
+
+Fix hang when closing a job or creating a forecast. This problem occurs
+if you created a forecast for a large job and temporary storage was not cleaned up. {ml-pull}352[#352] (issue: {ml-issue}350[#350])
 
 === Regressions
 
- == {es} version 6.5.5
+== {es} version 6.5.5
 
-=== Bug Fixes
-Fix a race condition if a forecast job requires overflowing to disk but cleanup of temporary
-storage fails. This can cause the autodetect process to hang on exit, if more forecast requests
-are in the queue. (See {ml-pull}352[352].)
 
- == {es} version 6.5.3
+== {es} version 6.5.4
+
+None
+
+== {es} version 6.5.3
 
 === Bug Fixes