Hi devs,
These days I found that about taskSummary, the Restful API(/applications/[app-id]/stages/[stage-id]/[stage-attempt-id]/taskSummary)'s default quantiles is `0.05,0.25,0.5,0.75,0.95`
But in Spark Web UI’s stage page, the quantiles is `0.0,0.25,0.5,0.75,1.0`. And the restful api’s default value
is not shown in Spark website’s [monitoring page](https://spark.apache.org/docs/3.0.0/monitoring.html). Detail can be seen in https://github.com/apache/spark/pull/31048#issuecomment-756773764
I have create a PR to keep them consistence, and hope you dev’s visibility and comments.
Best regards
Angers
