docs: update timeline dates for 12.0.0 and 13.0.0 (#27867)
docs: update timeline dates for 12.0.0 and 13.0.0 (#27867)

* docs: update dates for 12.0.0 and 13.0.0

* chore: update beta-13 date and 12 node version
electron/electron,bpasero/electron,bpasero/electron,gerhardberger/electron,electron/electron,electron/electron,gerhardberger/electron,electron/electron,bpasero/electron,gerhardberger/electron,bpasero/electron,electron/electron,gerhardberger/electron,electron/electron,bpasero/electron,gerhardberger/electron,gerhardberger/electron,gerhardberger/electron,bpasero/electron,electron/electron,bpasero/electron