add kicksecure's ram-wipe to "similar projects"

This commit updates the documentation to include a link to kicksecure's 'ram-wipe' project, just under the TAILS Memory Erasure link

 * https://www.kicksecure.com/wiki/Ram-wipe
 * https://www.kicksecure.com/wiki/Dev/RAM_Wipe#Differences_of_ram-wipe_versus_Tails_Memory_Erasure

Author: maltfield

docs/attribution.rst

@@ -53,6 +53,7 @@ The reader may be interested to investigate the following similar projects:
  * `luksAddNuke <http://lxer.com/module/newswire/view/103692/index.html>`_
  * `cryptsetup-nuke-keys <https://gitlab.com/kalilinux/packages/cryptsetup-nuke-keys>`_
  * `TAILS Memory Erasure <https://tails.boum.org/contribute/design/memory_erasure/>`_
+ * `Kicksecure ram-wipe <https://www.kicksecure.com/wiki/Ram-wipe/>`_
  * `TEDD (Transparent Emergency Data Destruction) <https://bitbucket.org/ausiv4/tedd/src/default/>`_
  * `s53 <https://github.com/BrassHornCommunications/s53>`_
  * `swatd <https://github.com/defuse/swatd>`_