[DOCS] Update tagged region for index alias desc (#46886)

docs/reference/glossary.asciidoc

@@ -100,11 +100,15 @@ An index is a logical namespace which maps to one or more
 +
 --
 // tag::index-alias-def[]
+// tag::index-alias-desc[]
 An index alias is a secondary name
 used to refer to one or more existing indices.
 
 Most {es} APIs accept an index alias
 in place of an index name.
+// end::index-alias-desc[]
+
+See {ref}/indices-add-alias.html[Add index alias].
 // end::index-alias-def[]
 
 See <<indices-add-alias>>.

docs/reference/indices/add-alias.asciidoc

@@ -6,7 +6,7 @@
 
 Creates or updates an index alias.
 
-include::{docdir}/glossary.asciidoc[tag=index-alias-def]
+include::{docdir}/glossary.asciidoc[tag=index-alias-desc]
 
 [source,console]
 ----

docs/reference/indices/alias-exists.asciidoc

@@ -6,7 +6,7 @@
 
 Checks if an index alias exists.
 
-include::{docdir}/glossary.asciidoc[tag=index-alias-def]
+include::{docdir}/glossary.asciidoc[tag=index-alias-desc]
 
 [source,console]
 ----

docs/reference/indices/aliases.asciidoc

@@ -6,7 +6,7 @@
 
 Adds or removes index aliases.
 
-include::{docdir}/glossary.asciidoc[tag=index-alias-def]
+include::{docdir}/glossary.asciidoc[tag=index-alias-desc]
 
 [source,console]
 ----

docs/reference/indices/delete-alias.asciidoc

@@ -6,7 +6,7 @@
 
 Deletes an existing index alias.
 
-include::{docdir}/glossary.asciidoc[tag=index-alias-def]
+include::{docdir}/glossary.asciidoc[tag=index-alias-desc]
 
 [source,console]
 ----

docs/reference/indices/get-alias.asciidoc

@@ -6,7 +6,7 @@
 
 Returns information about one or more index aliases.
 
-include::{docdir}/glossary.asciidoc[tag=index-alias-def]
+include::{docdir}/glossary.asciidoc[tag=index-alias-desc]
 
 [source,console]
 ----