fix(changelog_template): fix list format

Author: Lee-W

commitizen/cz/changelog_template.j2

@@ -7,7 +7,7 @@
 ### {{type}}
 {% for commit in commits-%}
 - {{commit}}
-{%- endfor %}
+{% endfor %}
 {% endif %}
 {%- endfor %}
 {%- endfor %}