VOL-4890 - Create a v2.11 release notes page.

Create a stub v2.11 release notes page to accumulate content.
Correct spelling in a few files.
Bump version string.

Change-Id: Ie303d239ccfdb6c8085656fafea59189ed32f508
diff --git a/overview/releases.rst b/overview/releases.rst
index 8970f83..1e070ed 100644
--- a/overview/releases.rst
+++ b/overview/releases.rst
@@ -121,5 +121,9 @@
      - December 30, 2022
      -
      -
-
+   * - `VOLTHA 2.11 <../release_notes/voltha_2.11.html>`_
+     - June 30, 2022
+     - December 30, 2022
+     -
+     -