Edit text associated with MSA Cost Estimation Tool

[jenro1]

Propose to append the following sentences to the end of the section "How much will this cost" on this page: https://www.camobilitymarketplace.org/how-to/go-contactless

"As stated, the prices in this workbook are maximums. Transit agencies are strongly encouraged to reach out to vendors directly for tailored pricing. Prices may be reduced and/or fee categories waived, at vendors' sole discretion."

[mrose914]

@jenro1 sounds good, will update changelog to reflect this update as well.