chore: Update targets for age-cli

.age.toml

@@ -9,3 +9,21 @@ replace = "version = \"{{new_version}}\""
 path = "src/atsphinx/sqlite3fts/__init__.py"
 search = "__version__ = \"{{current_version}}\""
 replace = "__version__ = \"{{new_version}}\""
+
+[[files]]
+path = "CHANGES.rst"
+search = """
+==============
+Latest changes
+==============
+"""
+replace = """
+==============
+Latest changes
+==============
+
+v{{new_version}}
+={% for _ in new_version %}={% endfor %}
+
+:Date: {{ now|date }} (JST)
+"""