[DOCS] Adds 6.7.0 release notes (#39155)

Author: lcawl

docs/reference/release-notes.asciidoc

@@ -5,6 +5,7 @@
 --
 This section summarizes the changes in each release.
 
+* <<release-notes-6.7.0>>
 * <<release-notes-6.6.1>>
 * <<release-notes-6.6.0>>
 * <<release-notes-6.5.4>>
@@ -41,6 +42,7 @@ This section summarizes the changes in each release.
 
 --
 
+include::release-notes/6.7.asciidoc[]
 include::release-notes/6.6.asciidoc[]
 include::release-notes/6.5.asciidoc[]
 include::release-notes/6.4.asciidoc[]

docs/reference/release-notes/6.7.0.asciidoc renamed to docs/reference/release-notes/6.7.asciidoc

@@ -1,9 +1,9 @@
 [[release-notes-6.7.0]]
-== 6.7.0 Release Notes
+== {es} version 6.7.0
 
 coming[6.7.0]
 
-Also see <<breaking-changes-6.7>>.
+Also see <<breaking-changes-6.7,Breaking changes in 6.7>>.
 
 [[breaking-6.7.0]]
 [float]