docs: update code of conduct (#23137)
docs: update code of conduct (#23137)

Update code of conduct to Contributor Covenant v2.0 in accordance with Electron joining the OpenJS foundation
gerhardberger/electron,seanchas116/electron,bpasero/electron,electron/electron,bpasero/electron,gerhardberger/electron,electron/electron,electron/electron,gerhardberger/electron,bpasero/electron,gerhardberger/electron,seanchas116/electron,electron/electron,seanchas116/electron,gerhardberger/electron,electron/electron,seanchas116/electron,bpasero/electron,seanchas116/electron,bpasero/electron,gerhardberger/electron,bpasero/electron,gerhardberger/electron,bpasero/electron,seanchas116/electron,electron/electron,electron/electron