Update travel section of spending company money with info on upgrading if you're taller than 1.95m or 6'5"

Why is this change being made?

As per @sytses, "At that length, you don't fit [in Economy]."

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