docs: add the performance doc to the table of contents (#20727)
docs: add the performance doc to the table of contents (#20727)


gerhardberger/electron,gerhardberger/electron,gerhardberger/electron,bpasero/electron,gerhardberger/electron,seanchas116/electron,bpasero/electron,bpasero/electron,electron/electron,electron/electron,seanchas116/electron,bpasero/electron,bpasero/electron,electron/electron,seanchas116/electron,seanchas116/electron,electron/electron,gerhardberger/electron,bpasero/electron,seanchas116/electron,electron/electron,bpasero/electron,seanchas116/electron,electron/electron,gerhardberger/electron,electron/electron,gerhardberger/electron