Fixed typo in django/db/backends/base/features.py.
@@ -234,7 +234,7 @@ class BaseDatabaseFeatures:
# Does the backend support indexing a TextField?
supports_index_on_text_field = True
- # Does the backed support window expressions (expression OVER (...))?
+ # Does the backend support window expressions (expression OVER (...))?
supports_over_clause = False
# Does the backend support CAST with precision?
