Add 2.9 version (#4590)

Signed-off-by: Fanit Kolchina <kolchfa@amazon.com>

_config.yml

@@ -5,10 +5,10 @@ baseurl: "/docs/latest" # the subpath of your site, e.g. /blog
 url: "https://opensearch.org" # the base hostname & protocol for your site, e.g. http://example.com
 permalink: /:path/
 
-opensearch_version: '2.8.0'
-opensearch_dashboards_version: '2.8.0'
-opensearch_major_minor_version: '2.8'
-lucene_version: '9_6_0'
+opensearch_version: '2.9.0'
+opensearch_dashboards_version: '2.9.0'
+opensearch_major_minor_version: '2.9'
+lucene_version: '9_7_0'
 
 # Build settings
 markdown: kramdown

_data/versions.json

@@ -1,10 +1,11 @@
 {
-  "current": "2.8",
+  "current": "2.9",
   "all": [
-    "2.8",
+    "2.9",
     "1.3"
   ],
   "archived": [
+    "2.8",
     "2.7",
     "2.6",
     "2.5",
@@ -17,7 +18,7 @@
     "1.1",
     "1.0"
     ],
-  "latest": "2.8"
+  "latest": "2.9"
 }