CHANGELOG.md in duckdb-0.0.12 vs CHANGELOG.md in duckdb-0.2.6.0

@@ -1,6 +1,15 @@
 # ChangeLog
 
+# 0.2.6.0
+
+- change version policy
+  - ruby-duckdb W.X.Y.Z supports duckdb W.X.Y
+- add DuckDB::Appender
+- bump DuckDB to v0.2.6 in CI.
+- remove unnecessary duckdb header file from MacOS CI.
+- add DuckDB::Connection#prepared_statement.
+
 ## 0.0.12
 
 - bump DuckDB to v0.2.5
 - support BLOB type (with DuckDB version 0.2.5 or later)