Fix templates (#2204) (#2211)

* More fixes

* Add API section and various fixes

scripts/ci/changelog/templates/changes_api.md.tera

@@ -0,0 +1,19 @@
+{%- import "change.md.tera" as m_c -%}
+
+### API
+
+{#- The changes are sorted by merge date -#}
+{% for pr in changes | sort(attribute="merged_at") -%}
+
+{%- if pr.meta.B -%}
+{%- if pr.meta.B.B0 -%}
+{#- We skip silent ones -#}
+{%- else -%}
+
+{%- if pr.meta.B.B1 and pr.meta.T.T2 and not pr.title is containing("ompanion") %}
+- {{ m_c::change(c=pr) }}
+{%- endif -%}
+{%- endif -%}
+
+{%- endif -%}
+{%- endfor %}