OvmfPkg/README: Fix typo in README

Fix typographical error in the OvmfPkg/README by correcting the 'an'
mistyped as 'and'.

Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: mikuback@linux.microsoft.com
Cc: ray.ni@intel.com
Signed-off-by: Kaaira Gupta <kaaira7319@gmail.com>
Message-Id: <20210605171712.GA16976@kaaira-HP-Pavilion-Notebook>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
1 file changed