Update cons desc (#33849)

* chore: updating constraint description.

requirements/constraints.txt

@@ -76,8 +76,12 @@ boto==2.39.0
 
 # adding these constraints to minimize boto3 and botocore changeset
 social-auth-core==4.3.0
+
+# social-auth-app-django versions after 5.2.0 has a problematic migration that will cause issues deployments with large
+# `social_auth_usersocialauth` tables. 5.1.0 has missing migration and 5.2.0 has that problematic migration.
 social-auth-app-django==5.0.0
 
+
 # urllib3>=2.0.0 conflicts with elastic search && snowflake-connector-python packages
 # which require urllib3<2 for now.
 # Issue for unpinning: https://github.com/openedx/edx-platform/issues/32222