Update Updating and release notes

Updating-and-release-notes.md

@@ -1,4 +1,4 @@
-### Current version: `3.0.1b20`
+### Current version: `3.0.1b21`
 
 You can check the version installed by running `obi --version`
 
@@ -21,6 +21,13 @@ python3 setup.py install
 
 ### Release notes:
 
+* `3.0.1b21`:
+  - New command: `obi taxonomy` to add local taxa
+  - `import`: now automatically renames `scientific_name` tag to `SCIENTIFIC_NAME`, and suggests using `--input-na-string` when a
+sequence import fails
+  - `head`: added output format options
+<br>
+
 * `3.0.1b20`:
   - `alignpairedend` and `ngsfilter`: ids of original sequences are now kept in the tags
 <br>