Bumps version to 8.19.12 (#3307)

Author: KOTungseth

shared/versions/stack/8.19.asciidoc

@@ -1,12 +1,12 @@
-:version:                8.19.11
+:version:                8.19.12
 ////
 bare_version never includes -alpha or -beta
 ////
-:bare_version:           8.19.11
-:logstash_version:       8.19.11
-:elasticsearch_version:  8.19.11
-:kibana_version:         8.19.11
-:apm_server_version:     8.19.11
+:bare_version:           8.19.12
+:logstash_version:       8.19.12
+:elasticsearch_version:  8.19.12
+:kibana_version:         8.19.12
+:apm_server_version:     8.19.12
 :branch:                 8.19
 :minor-version:          8.19
 :major-version:          8.x