Updating-and-release-notes.md

-### Current version: `3.0.0b38`
+### Current version: `3.0.0b39`
 
 You can check the version installed by running `obi --version`
 
@@ -21,6 +21,9 @@ python3 setup.py install
 
 ### Release notes:
 
+* `3.0.0b39`: 
+  - `export`: fixed a bug where exporting to tab format with a header would not export the first line of data
+
 * `3.0.0b38`: 
   - `grep`: fixed `--id-list` option