Update CHANGES.rst and bump version

CHANGES.rst

@@ -55,7 +55,7 @@ Version 2021.8 (released 2021-07-29, updated 2021-08-12)
 - Fix build errors.
 - Update module for InvenioRDM 6.0 release.
 
-Version 2021.9 (released 2021-08-16, updated 2021-09-09)
+Version 2021.9 (released 2021-08-16, updated 2021-09-20)
 
 - Capsulated CSS into Semantic UI Theme
 - Fixed UI bugs (sticky header and mobile menu)
@@ -75,3 +75,4 @@ Version 2021.9 (released 2021-08-16, updated 2021-09-09)
 - Use upstream implementation of "cite as"
 - Improve translation support
 - Fix checkboxes not having visible check marks
+- Make site name configurable

invenio_theme_tuw/version.py

@@ -11,4 +11,4 @@ This file is imported by ``invenio_theme_tuw.__init__``,
 and parsed by ``setup.py``.
 """
 
-__version__ = "2021.9.19"
+__version__ = "2021.9.20"