[FAB-13605] Updated Copyright footer

to 2019.

Change-Id: Ie20499d8b6e784bf418fd83d709ac6b2a7962081
Signed-off-by: pama-ibm <pama@ibm.com>

Author: pamandrejko

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 2018.{% endtrans %}
+        {% trans copyright=copyright|e %}&copy; Copyright Hyperledger 2019.{% endtrans %}
       {%- endif %}
     {%- endif %}
     <br>