docs: sync upgrade, RPC, and node operator pages after Cobalt - #2092

docs: sync upgrade, RPC, and node operator pages after Cobalt#2092

youssefea wants to merge 4 commits into

masterbase/docs:masterfrom

docs/kb-gaps-devrel-816-upgrades-node-opsbase/docs:docs/kb-gaps-devrel-816-upgrades-node-opsCopy head branch name to clipboard