Add release notes page for version 0.11.0

Patrole 0.11.0 has been released [1].
This commit adds a new page for 0.11.0 release notes.

[1] https://review.opendev.org/c/openstack/releases/+/767164

Change-Id: I123cf4ad83abcbf883ac33bfb376470e71dc8ae6
diff --git a/releasenotes/source/v0.11.0.rst b/releasenotes/source/v0.11.0.rst
new file mode 100644
index 0000000..19ca286
--- /dev/null
+++ b/releasenotes/source/v0.11.0.rst
@@ -0,0 +1,6 @@
+=====================
+v0.11.0 Release Notes
+=====================
+
+.. release-notes:: 0.11.0 Release Notes
+   :version: 0.11.0