Release notes for 7.17.20 (#16067)

Co-authored-by: João Duarte <[email protected]>

docs/static/releasenotes.asciidoc

@@ -3,6 +3,7 @@
 
 This section summarizes the changes in the following releases:
 
+* <<logstash-7-17-20,Logstash 7.17.20>>
 * <<logstash-7-17-19,Logstash 7.17.19>>
 * <<logstash-7-17-18,Logstash 7.17.18>>
 * <<logstash-7-17-17,Logstash 7.17.17>>
@@ -79,6 +80,14 @@ This section summarizes the changes in the following releases:
 * <<logstash-7-0-0-alpha1,Logstash 7.0.0-alpha1>>
 
 
+[[logstash-7-17-20]]
+=== Logstash 7.17.20 Release Notes
+
+No user-facing changes in Logstash core.
+
+==== Plugins
+No plugin changes.
+
 [[logstash-7-17-19]]
 === Logstash 7.17.19 Release Notes
 
@@ -4369,4 +4378,4 @@ Here are the plugin changes.
  - Tweaked logging statements to reduce verbosity
  - Fixed numerous issues relating to builds on Travis https://github.com/logstash-plugins/logstash-output-elasticsearch/pull/799[#799]
 * logstash-output-s3
- - Fixed issue where on restart, 0 byte files could erroneously be uploaded to s3 https://github.com/logstash-plugins/logstash-output-s3/issues/195[#195]
+ - Fixed issue where on restart, 0 byte files could erroneously be uploaded to s3 https://github.com/logstash-plugins/logstash-output-s3/issues/195[#195]