Add 6.6.2 release landing page

R1/source/releases/rel6.6.2.rst

+.. _rel6.6.2:
+
+Varnish Cache 6.6.2
+===================
+
+* Source download :download:`varnish-6.6.2.tgz <varnish-6.6.2.tgz>`
+
+* SHA256=acb222e462dcdcc7ef3ba361345e5f99197477b0688b3a3631a1038af3705409
+
+Varnish Cache 6.6.2 is a security fix of 6.6, related to
+:ref:`VSV00008`. All users should, as soon as possible, upgrade to a
+secure version, either 6.0.10, 7.0.2 or 6.6.2.
+
+More information:
+
+* List of most important `Changes in 6.6 <https://varnish-cache.org/docs/6.6/whats-new/changes-6.6.html>`_
+* Help on `Upgrading to Varnish 6.6 <https://varnish-cache.org/docs/6.6/whats-new/upgrading-6.6.html>`_
+* `Full changes.rst entry for 6.6.2 <https://github.com/varnishcache/varnish-cache/blob/6.6/doc/changes.rst#varnish-cache-662-2022-01-25>`_
+
+For installation instructions including information about cloud images see
+`the Varnish Installation Manual </docs/trunk/installation/index.html>`_
+
+We recommend using the manual installation procedure available at:
+https://packagecloud.io/varnishcache/varnish66/install#manual