Fix hyper links in SparkR documentation for CRAN submission

   Found the following (possibly) invalid URLs:
     URL: http://jsonlines.org/ (moved to https://jsonlines.org/)
       From: man/read.json.Rd
             man/write.json.Rd
       Status: 200
       Message: OK
     URL: https://dl.acm.org/citation.cfm?id=1608614 (moved to
https://dl.acm.org/doi/10.1109/MC.2009.263)
       From: inst/doc/sparkr-vignettes.html
       Status: 200
       Message: OK