Updating logos and favicon (#5369)

Author: annagav

cms/templates/cms/program_page.html

@@ -152,7 +152,7 @@ <h3 class="title">
             {% if page.program.has_mitxonline_courses %}
                 <img
                   class="mitx_logo"
-                  src="{% static 'images/logo-mitxonline.png' %}"
+                  src="{% static 'images/mitxonline_logo.png' %}"
                   alt="MITx"
                 />
             {% else %}