[8.6] Revert "docs: temp comment out include (#2626)" (#2641)

* Revert "docs: temp comment out include (#2628)"

This reverts commit 66f0fbf.

* Update docs/en/install-upgrade/breaking.asciidoc

* Update docs/en/install-upgrade/breaking.asciidoc

Author: bmorelli25

docs/en/install-upgrade/breaking.asciidoc

@@ -33,7 +33,7 @@ Upgrade Assistant provides information about which {dfeeds} need to be updated.
 This list summarizes the most important breaking changes in APM.
 For the complete list, go to {apm-guide-ref}/apm-breaking.html[APM breaking changes].
 
-// include::{apm-repo-dir}/apm-breaking.asciidoc[tag=notable-v8-breaking-changes]
+include::{apm-repo-dir}/all-breaking-changes.asciidoc[tag=86-bc]
 
 [[beats-breaking-changes]]
 === Beats breaking changes