ARROW-174 Fix Changelog Entry for 1.0 (#162)

Author: blink1073

bindings/python/docs/source/changelog.rst

@@ -1,13 +1,18 @@
 Changelog
 =========
 
+Changes in Version 1.0.0
+------------------------
+- Support BSON binary type.
+- Support BSON Decimal128 type.
+- Support Pandas 2.0 and Pandas extension types.
+- Support PyArrow 12.0.
+
 Changes in Version 0.7.0
 ------------------------
 - Added support for BSON Embedded Document type.
 - Added support for BSON Array type.
-- Added support for BSON Decimal128 type.
-- Added support for Pandas 2.0 and Pandas extension types.
-- Support PyArrow 12.0.
+- Support PyArrow 11.0.
 
 Changes in Version 0.6.3
 ------------------------