docs: update FVP TC2 model version and build (11.23/17)

Update the FVP TC2 model version and build (11.23/17) to match
the version used for testing in TF-A OpenCI.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: Ic7411ee4863428b7dfbe43cf39abfc2269f3c3ae
1 file changed