[no ticket][risk=no] Use CT dataset path for spark tutorial (#5911)
[no ticket][risk=no] Use CT dataset path for spark tutorial (#5911)

* use ct dataset path

* Update pyspark-usage.md
all-of-us/workbench,all-of-us/workbench,all-of-us/workbench,all-of-us/workbench,all-of-us/workbench,all-of-us/workbench,all-of-us/workbench,all-of-us/workbench,all-of-us/workbench