[doc] protocol for r2ogs6 update based on benchmarks

[doc] r2ogs6 uptdate protocol in doc/ folder
1 job for !33 with 51-update-to-ogsv6-4-1 in 3 minutes and 44 seconds (queued for 9 seconds)
detached
Status Name Job ID Coverage
  Test
passed test #140274
envinf2

00:03:44