Rename audit retention days setting (#8517)

I'm using this on .com and I think it's more explicit.

Author: stsewd

readthedocs/profiles/views.py

@@ -181,7 +181,7 @@ def get_object(self, queryset=None):  # noqa
 class UserSecurityLogView(PrivateViewMixin, ListView):
     model = AuditLog
     template_name = 'profiles/private/security_log.html'
-    days_limit = settings.RTD_DEFAULT_LOGS_RETENTION_DAYS
+    days_limit = settings.RTD_AUDITLOGS_DEFAULT_RETENTION_DAYS
 
     def get(self, request, *args, **kwargs):
         download_data = request.GET.get('download', False)

readthedocs/settings/base.py

@@ -122,7 +122,7 @@ def SESSION_COOKIE_SAMESITE(self):
     RTD_CLEAN_AFTER_BUILD = False
     RTD_MAX_CONCURRENT_BUILDS = 4
     RTD_BUILD_STATUS_API_NAME = 'docs/readthedocs'
-    RTD_DEFAULT_LOGS_RETENTION_DAYS = 30 * 3
+    RTD_AUDITLOGS_DEFAULT_RETENTION_DAYS = 30 * 3
 
     # Database and API hitting settings
     DONT_HIT_API = False