update version to 2.11.0 and update harbor submodule commit

.backportrc.json

@@ -13,6 +13,7 @@
     "release-2.7.0",
     "release-2.8.0",
     "release-2.9.0",
-    "release-2.10.0"
+    "release-2.10.0",
+    "release-2.11.0"
   ]
 }

config.toml

@@ -20,6 +20,11 @@ logo_repo = "https://github.com/cncf/artwork/tree/master/projects/harbor"
 youtube_video_id = "4zZiBcvZmgQ"
 alpine_js_version = "2.1.2"
 
+[[params.versions]]
+harborversion = "2.11.0"
+helmversion = "1.15"
+branchname = "release-2.11.0"
+
 [[params.versions]]
 harborversion = "2.10.0"
 helmversion = "1.14"

docs/_index.md

@@ -1,8 +1,8 @@
 ---
-title: Harbor 2.10 Documentation
+title: Harbor 2.11 Documentation
 ---
 
-Welcome to the Harbor 2.10.x documentation. This documentation includes all of the information that you need to install, configure, and use Harbor.
+Welcome to the Harbor 2.11.x documentation. This documentation includes all of the information that you need to install, configure, and use Harbor.
 
 ## Harbor Installation and Configuration