refactor: extend annotation_safe_list with new model & bump package version

Author: Andrii

.annotation_safe_list.yml

@@ -65,6 +65,10 @@ oel_tagging.TagImportTask:
   ".. no_pii:": "This model has no PII"
 oel_tagging.Taxonomy:
   ".. no_pii:": "This model has no PII"
+oel_subsections.Subsection:
+  ".. no_pii:": "This model has no PII"
+oel_subsections.SubsectionVersion:
+  ".. no_pii:": "This model has no PII"
 oel_units.Unit:
   ".. no_pii:": "This model has no PII"
 oel_units.UnitVersion:

openedx_learning/__init__.py

@@ -2,4 +2,4 @@
 Open edX Learning ("Learning Core").
 """
 
-__version__ = "0.20.0"
+__version__ = "0.21.0"