Update Permissions policy spec URL for Display Capture (#11774)
Update Permissions policy spec URL for Display Capture (#11774)

https://github.com/w3c/permissions/commit/09af80b
(https://github.com/w3c/permissions/pull/252) changed the heading and ID
value for the display-capture policy-controlled feeature.
chrisdavidmills/browser-compat-data,mdn/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data