[DOCS] Mark freeze API as deprecated (#72946)

elastic · May 11, 2021 · d0fd686 · d0fd686
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diff --git a/docs/reference/indices/apis/freeze.asciidoc b/docs/reference/indices/apis/freeze.asciidoc
@@ -6,6 +6,8 @@
 <titleabbrev>Freeze index</titleabbrev>
 ++++
 
+deprecated::[7.14, Frozen indices are no longer useful due to https://www.elastic.co/blog/significantly-decrease-your-elasticsearch-heap-memory-usage[recent improvements in heap memory usage].]
+
 Freezes an index.
 
 [[freeze-index-api-request]]