Fix breadcrumb level for HTTP client breadcrumbs in POTel (#4104)

Oversight from #4090 --
forgot to update the breadcrumb level created by the async httpx client

Makes all Network tests green.

sentry_sdk/integrations/httpx.py

@@ -174,6 +174,7 @@ async def send(self, request, **kwargs):
                 type="http",
                 category="httplib",
                 data=data,
+                level=http_client_status_to_breadcrumb_level(rv.status_code),
             )
 
             return rv