Add 2.6 version (#3099)

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: 2.5.0
-opensearch_dashboards_version: 2.5.0
-opensearch_major_minor_version: 2.5
-lucene_version: 9_4_1
+opensearch_version: 2.6.0
+opensearch_dashboards_version: 2.6.0
+opensearch_major_minor_version: 2.6
+lucene_version: 9_5_0
 
 # Build settings
 markdown: kramdown

_data/versions.json

@@ -1,6 +1,7 @@
 {
-  "current": "2.5",
+  "current": "2.6",
   "all": [
+    "2.6",
     "2.5",
     "2.4",
     "2.3",
@@ -12,5 +13,5 @@
     "1.1",
     "1.0"
   ],
-  "latest": "2.5"
+  "latest": "2.6"
 }