docs: update context isolation doc (#30898)
docs: update context isolation doc (#30898)

* docs: update context isolation doc

* Apply suggestions from code review

Co-authored-by: Mark Lee <aa107792d70404a603d12c20c7857bd0efcd33c1@users.noreply.github.com>

Co-authored-by: Cheng Zhao <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@zcbenz.com>
Co-authored-by: Mark Lee <aa107792d70404a603d12c20c7857bd0efcd33c1@users.noreply.github.com>
electron/electron,electron/electron,gerhardberger/electron,gerhardberger/electron,gerhardberger/electron,electron/electron,gerhardberger/electron,gerhardberger/electron,electron/electron,gerhardberger/electron,gerhardberger/electron,electron/electron,electron/electron,electron/electron