Issue/395/update ppm tool note

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I have…

[x] run the application locally (bin/rails server) and verified that my changes behave as expected.
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This pull request…

Fixes #395
At PPM tool Note, the second sentence text now reads, "Your actual incentive will be calculated using the current rates on the day you schedule your move in DPS."

To verify the changes proposed in this pull request…

Go to /resources/ppm-estimator and scroll down to the bottom of the page. The change is on the Note text.