docs: Updating Release information for v2.4
docs: Updating Release information for v2.4

Signed-off-by: Lauren Wehrmeister <c2872bb20a24754ba136deb455abb6add7d102f7@arm.com>
Change-Id: I5a7ae778999295f3453b7ab0bfc26351e545fb8f

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware