Updated release notes in docs

Author: ezimuel

docs/release-notes.asciidoc

@@ -1,6 +1,10 @@
 [[release-notes]]
 == Release notes
 
+* <<rn-7-15-0>>
+* <<rn-7-14-0>>
+* <<rn-7-13-1>>
+* <<rn-7-13-0>>
 * <<rn-7-12-0>>
 * <<rn-7-11-0>>
 * <<rn-7-10-0>>
@@ -24,7 +28,52 @@
 * <<rn-7-0-1>>
 * <<rn-7-0-0>>
 
+[discrete]
+[[rn-7-15-0]]
+=== 7.15.0
+
+* Updated endpoints for Elasticsearch 7.15.0
+  https://github.com/elastic/elasticsearch-php/commit/995f6d4bde7de76004e95d7a434b1d59da7a7e75[995f6d4]
+
+
+[discrete]
+[[rn-7-14-0]]
+=== 7.14.0
+
+* Usage of psr/log version 2 
+  https://github.com/elastic/elasticsearch-php/pull/1154[#1154]
+* Update search iterators to send `scroll_id` inside the request body
+  https://github.com/elastic/elasticsearch-php/pull/1134[#1134]
+* Added the `ingest.geoip.downloader.enabled=false` setting for ES
+  https://github.com/elastic/elasticsearch-php/commit/586735109dc18f22bfdf3b73ab0621b37e857be1[5867351]
+* Removed phpcs for autogenerated files (endpoints)
+  https://github.com/elastic/elasticsearch-php/commit/651c57b2e6bf98a0fd48220949966e630e5a804a[651c57b]
+
 
+[discrete]
+[[rn-7-13-1]]
+=== 7.13.1
+
+* Added port in url for trace and logger messages
+  https://github.com/elastic/elasticsearch-php/pull/1126[#1126]
+
+
+[discrete]
+[[rn-7-13-0]]
+=== 7.13.0
+
+* (DOCS) Added the HTTP meta data section
+  https://github.com/elastic/elasticsearch-php/pull/1143[#1143]
+* Added support for API Compatibility Header
+  https://github.com/elastic/elasticsearch-php/pull/1142[#1142]
+* (DOCS) Added Helpers section to PHP book
+  https://github.com/elastic/elasticsearch-php/pull/1129[#1129]
+* Added the API description in phpdoc section for each endpoint
+  https://github.com/elastic/elasticsearch-php/commit/9e05c8108b638b60cc676b6a4f4be97c7df9eb64[9e05c81]
+* Usage of PHPUnit 9 only + migrated xml configurations
+  https://github.com/elastic/elasticsearch-php/commit/038b5dd043dc76b20b9f5f265ea914a38d33568d[038b5dd]
+
+  
 [discrete]
 [[rn-7-12-0]]
 === 7.12.0