Update changelog for 3.6.2.

debian/changelog

-tails (3.7) UNRELEASED; urgency=medium
+tails (3.6.2) UNRELEASED; urgency=medium
 
-  * Dummy entry for next release.
+  * Security fixes
+    - Upgrade Tor Browser to 7.5.3 (MFSA 2018-10, Closes: #15459).
+    - Upgrade Thunderbird to 1:52.7.0-1~deb9u1.0tails1 (DSA-4155,
+      Closes: #15471).
+    - Upgrade libicu to 57.1-6+deb9u2 (DSA-4150).
+    - Upgrade intel-microcode to 3.20180312.1~bpo9+1. Implements
+      IBRS/IBPB/STIPB support, Spectre-v2 mitigation for: Sandybridge,
+      Ivy Bridge, Haswell, Broadwell, Skylake, Kaby Lake, Coffee Lake
+      (Closes: #15173).
 
- -- Tails developers <tails@boum.org>  Mon, 19 Mar 2018 11:21:41 +0100
+  * Bugfixes
+    - Tor Browser AppArmor profile:
+     * Grant the main Firefox process access to machine-id: needed for
+       IBus support (Closes: #15437).
+     * Allow access to extensions installed by the user such as Tails
+       Verification (Closes: #15434).
+    - Remove packages needed to support Video Acceleration API
+      (VA-API) because they breaks opening GNOME Settings and Totem in
+      Tails 3.6 on some computers (only NVIDIA for now but perhaps
+      other hardware is affected). (Closes: #15433, #15449)
+    - Upgrade Linux to 4.15.11-1 and bump the aufs submodule (Closes:
+      #15456, #15457).
+    - tails-documentation script:
+      * open translated documentation page in Tor Browser when online
+        (Closes: #15371).
+      * use documented syntax for os.execv (Refs: #15332)
+      * re-add support for passing a HTML anchor as the second
+        argument.
+    - Fix issue where the tails-persistence-setup user's guid would be
+      changed when it was the uid that was intended (Closes: #15422).
+
+ -- Tails developers <tails@boum.org>  Thu, 29 Mar 2018 13:41:26 +0200
 
 tails (3.6.1) unstable; urgency=medium