Fix broken elements in the changelog for 7.9 (elastic#20597)

CHANGELOG.next.asciidoc

@@ -476,7 +476,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Improve ECS categorization field mappings in system module. {issue}16031[16031] {pull}18065[18065]
 - Change the `json.*` input settings implementation to merge parsed json objects with existing objects in the event instead of fully replacing them. {pull}17958[17958]
 - Improve ECS categorization field mappings in osquery module. {issue}16176[16176] {pull}17881[17881]
-- Added http_endpoint input{pull}18298[18298]
+- Add http_endpoint input. {pull}18298[18298]
 - Add support for array parsing in azure-eventhub input. {pull}18585[18585]
 - Added `observer.vendor`, `observer.product`, and `observer.type` to PANW module events. {pull}18223[18223]
 - The `logstash` module can now automatically detect the log file format (JSON or plaintext) and process it accordingly. {issue}9964[9964] {pull}18095[18095]
@@ -537,7 +537,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 *Journalbeat*
 
 - Added an `id` config option to inputs to allow running multiple inputs on the
-  same journal. {pull}18467{18467}
+  same journal. {pull}18467[18467]
 - Add basic ECS categorization and `log.syslog` fields. {pull}19176[19176]
 
 *Metricbeat*
@@ -675,6 +675,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 *Journalbeat*
 
 *Metricbeat*
+
 - Deprecate tags config parameter in cloudwatch metricset. {pull}16733[16733]
 - Deprecate tags.resource_type_filter config parameter and replace with resource_type. {pull}19688[19688]