scalar vs vector docs missing a word

[rsalmond]

https://github.com/FDio/vpp/blob/master/docs/aboutvpp/scalar-vs-vector-packet-processing.rst?plain=1#L60-L62

The inefficiencies associated with the deep call stack by receiving vectors of up to 256 packets at a time from the Network Interface, and processes them using a directed graph of node.

I'm sure it's trying to say something about the value of processing multiple packets at once, but it's not clear exactly what that is.