Fix typo

[matthewyip1511]

Changed About to Amount, and also fixed capitalisation issue in the next line 🙂

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Files with missing lines	Coverage Δ	Complexity Δ
...du/address/model/client/insurance/claim/Claim.java	78.78% <ø> (ø)	13.00 <0.00> (ø)