FAB-11331 Fix copyright year in docs

Change-Id: I025b84f317edd19616af470c9ec5c234251cc641
Signed-off-by: Kostas Christidis <kostas@christidis.io>

Author: Kostas Christidis

docs/source/_templates/footer.html

@@ -18,7 +18,7 @@
       {%- if hasdoc('copyright') %}
         {% trans path=pathto('copyright'), copyright=copyright|e %}&copy; <a href="{{ path }}">Copyright</a> {{ copyright }}.{% endtrans %}
       {%- else %}
-        {% trans copyright=copyright|e %}&copy; Copyright Hyperledger 2017.{% endtrans %}
+        {% trans copyright=copyright|e %}&copy; Copyright Hyperledger 2018.{% endtrans %}
       {%- endif %}
     {%- endif %}
     <br>