Update source/handbook/acquisitions/index.html.md

Why is this change being made?

Added "cash" before max purchase price to make it clear that this is the cash payment and does not include any equity we offer.

@markpundsack @eliran.mesika

Does this MR meet the acceptance criteria?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what