[release-notes] Release notes 7.14.0 on 7.14 branch (#5908)

Co-authored-by: Mpdreamz <Mpdreamz@users.noreply.github.com>

Author: github-actions[bot]

docs/release-notes/release-notes-7.14.0-generated.asciidoc

@@ -13,6 +13,7 @@
 - * Fix discrepancies in Watcher API models which fail (de)serialization https://github.com/elastic/elasticsearch-net/pull/5761[#5761]  (issue: https://github.com/elastic/elasticsearch-net/issues/5725[#5725])
 - * Fix hourly watcher scheduler serialisation https://github.com/elastic/elasticsearch-net/pull/5888[#5888]  (issue: https://github.com/elastic/elasticsearch-net/issues/5761[#5761])
 - * Fix null-ref exception when track total hits is disabled https://github.com/elastic/elasticsearch-net/pull/5898[#5898]  (issue: https://github.com/elastic/elasticsearch-net/issues/5892[#5892])
+- * Fix index exists response validity https://github.com/elastic/elasticsearch-net/pull/5902[#5902]  (issue: https://github.com/elastic/elasticsearch-net/issues/5901[#5901])
 
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