no-jira: replace the notes icon

src/main/webapp/static/themes/light/modules/_icons.scss

@@ -146,7 +146,7 @@ $fa-css-prefix: "o_icon" !default;
 .o_icon_node_after:before { content: $fa-var-long-arrow-down; }
 .o_icon_node_before:before { content: $fa-var-long-arrow-up; }
 .o_icon_node_under:before { content: $fa-var-mail-reply; }
-.o_icon_notes:before { content: $fa-var-twitch; }
+.o_icon_notes:before { content: $fa-var-pencil; }
 .o_icon_notification:before { content: $fa-var-rss;}
 .o_icon_open_tree:before { content: $fa-var-caret-right;}
 .o_icon_open_togglebox:before { content: $fa-var-caret-right;}