Mark Device-Memory CH header unsupported in Safari (#7229)
Mark Device-Memory CH header unsupported in Safari (#7229)

This change marks the Device-Memory HTTP Client Hint request header
unsupported in Safari and iOS Safari. (Confirmed by manual testing and
code inspection.)
mdn/browser-compat-data,chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data