update ci release for 8.13.0 (elastic#16030)

Author: kaisecheng

ci/logstash_releases.json

@@ -3,11 +3,11 @@
     "5.x": "5.6.16",
     "6.x": "6.8.23",
     "7.x": "7.17.18",
-    "8.x": "8.12.1"
+    "8.x": "8.13.0"
   },
   "snapshots": {
     "7.x": "7.17.19-SNAPSHOT",
-    "8.x": "8.12.2-SNAPSHOT",
-    "main": "8.13.0-SNAPSHOT"
+    "8.x": "8.13.1-SNAPSHOT",
+    "main": "8.14.0-SNAPSHOT"
   }
 }