chore(changelog): add new contributors section

cliff.toml

@@ -61,6 +61,18 @@ body = """
 {%- endfor -%}
 {%- endfor %}
 
+{%- if not release_link -%}
+{% if github.contributors | filter(attribute="is_first_time", value=true) | length != 0 %}
+### New Contributors
+{%- endif %}\
+{% for contributor in github.contributors | filter(attribute="is_first_time", value=true) %}
+* @{{ contributor.username }} made their first contribution
+{%- if contributor.pr_number %} in \
+[#{{ contributor.pr_number }}]({{ self::remote_url() }}/pull/{{ contributor.pr_number }}) \
+{%- endif %}
+{%- endfor -%}
+{%- endif -%}
+
 {% if version %}
 {% if previous.version %}
 {%- if release_link -%}