revise install_r_dependencies.sh (#2397)
revise install_r_dependencies.sh (#2397)

* use actions/cache@master

Signed-off-by: yl790 <506e136862ca6a2cd6209c2ab7376874a235e7c2@rstudio.com>

* revise install_r_dependencies.sh

Signed-off-by: yl790 <506e136862ca6a2cd6209c2ab7376874a235e7c2@rstudio.com>
rstudio/sparklyr,rstudio/sparklyr,rstudio/sparklyr,rstudio/sparklyr