Bumps version to 8.17.8 (#3230)

Author: KOTungseth

shared/versions/stack/8.17.asciidoc

@@ -1,12 +1,12 @@
-:version:                8.17.7
+:version:                8.17.8
 ////
 bare_version never includes -alpha or -beta
 ////
-:bare_version:           8.17.7
-:logstash_version:       8.17.7
-:elasticsearch_version:  8.17.7
-:kibana_version:         8.17.7
-:apm_server_version:     8.17.7
+:bare_version:           8.17.8
+:logstash_version:       8.17.8
+:elasticsearch_version:  8.17.8
+:kibana_version:         8.17.8
+:apm_server_version:     8.17.8
 // branch is 8.17 instead of 8.x for long-term linking purposes
 :branch:                 8.17
 :minor-version:          8.17