[{"order_no":12345,"results":[{"a":"customer","b":"name","result":"John Doe"},{"a":"order_info","b":"date","result":"2022-04-19T00:00:00.000Z"},{"a":"order_type","b":"type","result":"Standard"}]}]

db.collection.update({"results.a":"customer","results.b":"name","results.result":"John Doe"},{"$set":{"results.$.a":"customer","results.$.b":"name","results.$.result":"John Doe Ltd"}})