Fix broken link in 2.7 release notes

Change-Id: I64ccf7d9795b55040670815688261e4cb35b2e41

ReleaseNotes/ReleaseNotes-2.7.txt

diff --git a/ReleaseNotes/ReleaseNotes-2.7.txt b/ReleaseNotes/ReleaseNotes-2.7.txt
index 3a2ebf9..5133c04 100644
--- a/ReleaseNotes/ReleaseNotes-2.7.txt
+++ b/ReleaseNotes/ReleaseNotes-2.7.txt
@@ -73,7 +73,7 @@
 
 * New 'Stream Events' global capability.
 +
-The link:http://gerrit-documentation.googlecode.com/svn/Documentation/2.7/access-control.txt#capability_streamEvents[
+The link:http://gerrit-documentation.googlecode.com/svn/Documentation/2.7/access-control.html#capability_streamEvents[
 Stream Events capability] controls access to the `stream-events` ssh command.
 +
 Only administrators and users having this capability are allowed to use `stream-events`.