fixes bad markup

Fixes #6753

docs/releasenotes.asciidoc

@@ -2,34 +2,24 @@
 == Kibana {version} Release Notes
 
 The {version} release of Kibana requires Elasticsearch {esversion} or later.
-////
+
 [float]
 [[breaking]]
-== Breaking Change
+== Breaking Changes
 
-* {k4issue}5591[Issue 5591]: The command-line plugin tool no longer supports Github.
+// * {k4issue}5591[Issue 5591]: The command-line plugin tool no longer supports Github.
 
 [float]
 [[enhancements]]
 == Enhancements
 
-* {k4issue}6387[Issue 6387]: A new look for Kibana: new logo and UI, improved layout and navigation.
-* {k4pull}6402[Pull Request 6402]: New command-line plugin management tool supports cross-stack plugin management.
-* {k4issue}5130[Issue 5130]: Adds a duration formatter for numeric fields.
-* {k4issue}2964[Issue 2964]: Adds a setting to configure the default columns visible in the Discover tab.
-* {k4issue}6379[Issue 6379]: Adds a title case formatter for string fields.
-* {k4pull}6610[Pull Request 6610]: Adds a configuration variable for the Kibana server name.
+// * {k4issue}6387[Issue 6387]: A new look for Kibana: new logo and UI, improved layout and navigation.
 
 [float]
 [[bugfixes]]
 == Bug Fixes
 
-* {k4issue}5914[Issue 5914]: Adds ability to aggregate on unindexed fields.
-* {k4issue}6142[Issue 6142]: Allows the `exists` filter on unindexed fields.
-* {k4pull}6158[Pull Request 6158]: Corrects a sorting issue with Boolean values.
-* {k4issue}5898[Issue 5898]: Corrects a stale state issue with the *Show Empty Buckets* option in histogram 
-visualizations.
-* {k4pull}6627[Issue 6627]: Corrects the default value of `pingTimeout` to match the value in the documentation.
+// * {k4issue}5914[Issue 5914]: Adds ability to aggregate on unindexed fields.
 
 [float]
 [[plugins-apis]]
@@ -38,15 +28,4 @@ visualizations.
 NOTE: The items in this section are not a complete list of the internal changes relating to development in Kibana. Plugin 
 framework and APIs are not formally documented and not guaranteed to be backward compatible from release to release.
 
-* {k4issue}5198[Issue 5198]: Injects buttons from the plugin to the navigation bar.
-* {k4issue}6016[Issue 6016]: Enables plugins to export settings pages.
-* {k4issue}5214[Issue 5214]: Make the document table pluggable.
-* {k4pull}6122[Pull Requests 6122 and 6222]: Assorted plugins.
-* {k4pull}6054[Pull Request 6054]: Enables nested plugins.
-* {k4issue}6304[Issue 6304]: Enables plugins to add prefixes to the configuration.
-* {k4pull}6177[Pull Request 6177]: Enables plugins to exist outside the Kibana source tree.
-* {k4pull}5871[Pull Request 5871]: Changes to the autoloading of plugin dependencies.
-* {k4issue}5199[Issue 5199]: API for creating index patterns.
-* {k4pull}6534[Pull Request 6534]: Adds a `_count` API to retrieve the index pattern document count.
-* {k4pull}5870[Pull Request 5870]: Updates the wording of the error message when the Kibana server can’t start due to a 
-code-level issue.
+// * {k4issue}5198[Issue 5198]: Injects buttons from the plugin to the navigation bar.