Add changelog 45.0.0

diff --git a/dev/changelog/45.0.0.md b/dev/changelog/45.0.0.md
new file mode 100644
index 0000000..93659b1
--- /dev/null
+++ b/dev/changelog/45.0.0.md

@@ -0,0 +1,42 @@
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+# Apache DataFusion Python 45.0.0 Changelog
+
+This release consists of 2 commits from 2 contributors. See credits at the end of this changelog for more information.
+
+**Fixed bugs:**
+
+- fix: add to_timestamp_nanos [#1020](https://github.com/apache/datafusion-python/pull/1020) (chenkovsky)
+
+**Other:**
+
+- Chore/upgrade datafusion 45 [#1010](https://github.com/apache/datafusion-python/pull/1010) (kevinjqliu)
+
+## Credits
+
+Thank you to everyone who contributed to this release. Here is a breakdown of commits (PRs merged) per contributor.
+
+```
+     1	Kevin Liu
+     1	Tim Saucer
+```
+
+Thank you also to everyone who contributed in other ways such as filing issues, reviewing PRs, and providing feedback on this release.
+