doc: Correct invalid JSON in npm-update docs
doc: Correct invalid JSON in npm-update docs

Credit: da39a3ee5e6b4b0d3255bfef95601890afd80709@robludwig
Reviewed-By: da39a3ee5e6b4b0d3255bfef95601890afd80709@iarna
PR-URL: https://github.com/npm/npm/pull/11474

cchamberlain/npm-msys2,lxe/npm,Volune/npm,cchamberlain/npm,cchamberlain/npm,evocateur/npm,chadnickbok/npm,midniteio/npm,chadnickbok/npm,misterbyrne/npm,chadnickbok/npm,DaveEmmerson/npm,TimeToogo/npm,TimeToogo/npm,evocateur/npm,cchamberlain/npm,lxe/npm,lxe/npm,yodeyer/npm,DaveEmmerson/npm,yodeyer/npm,midniteio/npm,midniteio/npm,Volune/npm,cchamberlain/npm-msys2,cchamberlain/npm-msys2,yodeyer/npm,evocateur/npm,DaveEmmerson/npm,misterbyrne/npm,misterbyrne/npm,TimeToogo/npm,Volune/npm