docs: explain the null webContents case in permission checks (#30645)
docs: explain the null webContents case in permission checks (#30645)

* docs: explain the null webContents case in permission checks

* Update docs/api/session.md

Co-authored-by: Erick Zhao <9d06d702b94085552421e06c8b16f2d3882b06e0@hotmail.ca>

Co-authored-by: Erick Zhao <9d06d702b94085552421e06c8b16f2d3882b06e0@hotmail.ca>
gerhardberger/electron,electron/electron,gerhardberger/electron,gerhardberger/electron,gerhardberger/electron,electron/electron,electron/electron,electron/electron,gerhardberger/electron,electron/electron,electron/electron,electron/electron,gerhardberger/electron,gerhardberger/electron