Update 2.11.8 release notes

Change-Id: I02dd628a4579e532371c4b671b5195ef2ec2a6ee

ReleaseNotes/ReleaseNotes-2.11.8.txt

diff --git a/ReleaseNotes/ReleaseNotes-2.11.8.txt b/ReleaseNotes/ReleaseNotes-2.11.8.txt
index ef4a7ec..0f9dc21 100644
--- a/ReleaseNotes/ReleaseNotes-2.11.8.txt
+++ b/ReleaseNotes/ReleaseNotes-2.11.8.txt
@@ -39,3 +39,5 @@
 +
 When the action was cancelled, the content of the input box was still
 there when opening it again.
+
+* Fix internal server error when aborting ssh command.