[DOCS] Update include statements for 8.1 breaking changes (#1878)

Updates the ES breaking changes headings for elastic/elasticsearch#79162

Author: jrodewig

docs/en/install-upgrade/breaking.asciidoc

@@ -53,91 +53,7 @@ include::{beats-repo-dir}/release-notes/breaking/breaking-8.0.asciidoc[tag=notab
 This list summarizes the most important breaking changes in {es} {version}. For
 the complete list, go to {ref}/breaking-changes.html[{es} breaking changes].
 
-include::{es-repo-dir}/migration/migrate_8_0.asciidoc[tag=notable-breaking-changes]
-
-==== Aggregations changes
-include::{es-repo-dir}/migration/migrate_8_0/aggregations.asciidoc[tag=notable-breaking-changes]
-
-==== Allocation changes
-include::{es-repo-dir}/migration/migrate_8_0/allocation.asciidoc[tag=notable-breaking-changes]
-
-==== Analysis changes
-include::{es-repo-dir}/migration/migrate_8_0/analysis.asciidoc[tag=notable-breaking-changes]
-
-==== Circuit breaker changes
-include::{es-repo-dir}/migration/migrate_8_0/breaker.asciidoc[tag=notable-breaking-changes]
-
-==== {ccr-cap} ({ccr-init}) changes
-include::{es-repo-dir}/migration/migrate_8_0/ccr.asciidoc[tag=notable-breaking-changes]
-
-==== Cluster changes
-include::{es-repo-dir}/migration/migrate_8_0/cluster.asciidoc[tag=notable-breaking-changes]
-
-==== Discovery changes
-include::{es-repo-dir}/migration/migrate_8_0/discovery.asciidoc[tag=notable-breaking-changes]
-
-==== EQL changes
-include::{es-repo-dir}/migration/migrate_8_0/eql.asciidoc[tag=notable-breaking-changes]
-
-==== HTTP changes
-include::{es-repo-dir}/migration/migrate_8_0/http.asciidoc[tag=notable-breaking-changes]
-
-==== {ilm-cap} ({ilm-init}) changes
-include::{es-repo-dir}/migration/migrate_8_0/ilm.asciidoc[tag=notable-breaking-changes]
-
-==== Indices changes
-include::{es-repo-dir}/migration/migrate_8_0/indices.asciidoc[tag=notable-breaking-changes]
-
-==== Ingest pipeline changes
-include::{es-repo-dir}/migration/migrate_8_0/ingest.asciidoc[tag=notable-breaking-changes]
-
-==== Java API changes
-include::{es-repo-dir}/migration/migrate_8_0/java.asciidoc[tag=notable-breaking-changes]
-
-==== Mapping changes
-include::{es-repo-dir}/migration/migrate_8_0/mappings.asciidoc[tag=notable-breaking-changes]
-
-==== Network changes
-include::{es-repo-dir}/migration/migrate_8_0/network.asciidoc[tag=notable-breaking-changes]
-
-==== Node changes
-include::{es-repo-dir}/migration/migrate_8_0/node.asciidoc[tag=notable-breaking-changes]
-
-==== Packaging changes
-include::{es-repo-dir}/migration/migrate_8_0/packaging.asciidoc[tag=notable-breaking-changes]
-
-==== Reindex changes
-include::{es-repo-dir}/migration/migrate_8_0/reindex.asciidoc[tag=notable-breaking-changes]
-
-==== REST API changes
-include::{es-repo-dir}/migration/migrate_8_0/api.asciidoc[tag=notable-breaking-changes]
-
-==== Rollup changes
-include::{es-repo-dir}/migration/migrate_8_0/rollup.asciidoc[tag=notable-breaking-changes]
-
-==== Search changes
-include::{es-repo-dir}/migration/migrate_8_0/search.asciidoc[tag=notable-breaking-changes]
-
-==== Security changes
-include::{es-repo-dir}/migration/migrate_8_0/security.asciidoc[tag=notable-breaking-changes]
-
-==== Settings changes
-include::{es-repo-dir}/migration/migrate_8_0/settings.asciidoc[tag=notable-breaking-changes]
-
-==== Snapshot and restore changes
-include::{es-repo-dir}/migration/migrate_8_0/snapshots.asciidoc[tag=notable-breaking-changes]
-
-==== Thread pool changes
-include::{es-repo-dir}/migration/migrate_8_0/threadpool.asciidoc[tag=notable-breaking-changes]
-
-==== {transform-cap} changes
-include::{es-repo-dir}/migration/migrate_8_0/transform.asciidoc[tag=notable-breaking-changes]
-
-==== Transport changes
-include::{es-repo-dir}/migration/migrate_8_0/transport.asciidoc[tag=notable-breaking-changes]
-
-==== Watcher changes
-include::{es-repo-dir}/migration/migrate_8_0/watcher.asciidoc[tag=notable-breaking-changes]
+include::{es-repo-dir}/migration/migrate_8_1.asciidoc[tag=notable-breaking-changes]
 
 [[elasticsearch-hadoop-breaking-changes]]
 === {es} Hadoop breaking changes