chore: update CHANGELOG.md to include timedelta PRs (#1409)

Author: sycai

CHANGELOG.md

@@ -9,10 +9,10 @@
 
 ### Features
 
+* (Preview) Support add, sub, mult, div, and more between timedeltas ([#1396](https://github.com/googleapis/python-bigquery-dataframes/issues/1396)) ([ffa63d4](https://github.com/googleapis/python-bigquery-dataframes/commit/ffa63d47ca1dd1a18617f44d9b3bc33419656a20))
+* (Preview) Support comparison, ordering, and filtering for timedeltas ([#1387](https://github.com/googleapis/python-bigquery-dataframes/issues/1387)) ([34d01b2](https://github.com/googleapis/python-bigquery-dataframes/commit/34d01b27f867abf10bddffdf4f88fa7052cd237c))
+* (Preview) Support subtraction in DATETIME/TIMESTAMP columns with timedelta columns ([#1390](https://github.com/googleapis/python-bigquery-dataframes/issues/1390)) ([50ad3a5](https://github.com/googleapis/python-bigquery-dataframes/commit/50ad3a56e9bd77bb77d60d7d5ec497e3335a7177))
 * JSON dtype support for read_pandas and Series constructor ([#1391](https://github.com/googleapis/python-bigquery-dataframes/issues/1391)) ([44f4137](https://github.com/googleapis/python-bigquery-dataframes/commit/44f4137adb02790e07c696f0641bc58390857210))
-* Support add, sub, mult, div, and more between timedeltas ([#1396](https://github.com/googleapis/python-bigquery-dataframes/issues/1396)) ([ffa63d4](https://github.com/googleapis/python-bigquery-dataframes/commit/ffa63d47ca1dd1a18617f44d9b3bc33419656a20))
-* Support comparison, ordering, and filtering for timedeltas ([#1387](https://github.com/googleapis/python-bigquery-dataframes/issues/1387)) ([34d01b2](https://github.com/googleapis/python-bigquery-dataframes/commit/34d01b27f867abf10bddffdf4f88fa7052cd237c))
-* Support subtraction in DATETIME/TIMESTAMP columns with timedelta columns ([#1390](https://github.com/googleapis/python-bigquery-dataframes/issues/1390)) ([50ad3a5](https://github.com/googleapis/python-bigquery-dataframes/commit/50ad3a56e9bd77bb77d60d7d5ec497e3335a7177))
 
 
 ### Bug Fixes
@@ -36,6 +36,9 @@
 
 ### Features
 
+* (Preview) Support addition between a timestamp and a timedelta ([#1369](https://github.com/googleapis/python-bigquery-dataframes/issues/1369)) ([b598aa8](https://github.com/googleapis/python-bigquery-dataframes/commit/b598aa8ef4f6dd0cbca7629d290c5e511cdc86fc))
+* (Preview) Support casting floats and list-likes to timedelta series ([#1362](https://github.com/googleapis/python-bigquery-dataframes/issues/1362)) ([65933b6](https://github.com/googleapis/python-bigquery-dataframes/commit/65933b6b7608ec52717e818d8ec1732fb756b67b))
+* (Preview) Support timestamp subtractions ([#1346](https://github.com/googleapis/python-bigquery-dataframes/issues/1346)) ([86b7e72](https://github.com/googleapis/python-bigquery-dataframes/commit/86b7e72097ce67d88b72cfe031080d5af22f65cd))
 * Add `bigframes.bigquery.st_area` and suggest it from `GeoSeries.area` ([#1318](https://github.com/googleapis/python-bigquery-dataframes/issues/1318)) ([8b5ffa8](https://github.com/googleapis/python-bigquery-dataframes/commit/8b5ffa8893b51016c51794865c40def74ea6716b))
 * Add `GeoSeries.from_xy()` ([#1364](https://github.com/googleapis/python-bigquery-dataframes/issues/1364)) ([3c3e14c](https://github.com/googleapis/python-bigquery-dataframes/commit/3c3e14c715f476ca44f254c0d53d639ea5988a8d))
 
@@ -56,6 +59,7 @@
 
 ### Features
 
+* (Preview) Support timedeltas for read_pandas() ([#1349](https://github.com/googleapis/python-bigquery-dataframes/issues/1349)) ([866ba9e](https://github.com/googleapis/python-bigquery-dataframes/commit/866ba9efb54f11c1fc2ced0d7995fff86277b049))
 * Add Series.keys() ([#1342](https://github.com/googleapis/python-bigquery-dataframes/issues/1342)) ([deb015d](https://github.com/googleapis/python-bigquery-dataframes/commit/deb015dc1276549519d51363501355272f8976d8))
 * Allow `case_when` to change dtypes if case list contains the condition `(True, some_default_value)` ([#1311](https://github.com/googleapis/python-bigquery-dataframes/issues/1311)) ([5c2a2c6](https://github.com/googleapis/python-bigquery-dataframes/commit/5c2a2c6086be20cba7da08ecd37899699aab518f))
 * Support python type as astype arg ([#1316](https://github.com/googleapis/python-bigquery-dataframes/issues/1316)) ([b26e135](https://github.com/googleapis/python-bigquery-dataframes/commit/b26e13570f198ec4d252590a8c07253624db667a))
@@ -96,6 +100,7 @@
 ### Features
 
 * (df|s).hist(), (df|s).line(), (df|s).area(), (df|s).bar(), df.scatter() ([#1320](https://github.com/googleapis/python-bigquery-dataframes/issues/1320)) ([bd3f584](https://github.com/googleapis/python-bigquery-dataframes/commit/bd3f584a7eab5d01dedebb7ca2485942ef5b5ebe))
+* (Preview) Define timedelta type and to_timedelta function ([#1317](https://github.com/googleapis/python-bigquery-dataframes/issues/1317)) ([3901951](https://github.com/googleapis/python-bigquery-dataframes/commit/39019510d0c2758096589ecd0d83175f313a8cf5))
 * Add DataFrame.corrwith method ([#1315](https://github.com/googleapis/python-bigquery-dataframes/issues/1315)) ([b503355](https://github.com/googleapis/python-bigquery-dataframes/commit/b5033559a77a9bc5ffb7dc1e44e02aaaaf1e051e))
 * Add DataFrame.mask method ([#1302](https://github.com/googleapis/python-bigquery-dataframes/issues/1302)) ([8b8155f](https://github.com/googleapis/python-bigquery-dataframes/commit/8b8155fef9c5cd36cfabf728ccebf6a14a1cbbda))
 * Enable reading JSON data with `dbjson` extension dtype ([#1139](https://github.com/googleapis/python-bigquery-dataframes/issues/1139)) ([f672262](https://github.com/googleapis/python-bigquery-dataframes/commit/f6722629fb47eed5befb0ecae2e6b5ec9042d669))