Modify ERA take down policy text

[ConnorSheremeta]

The text for the take down policy (https://era.library.ualberta.ca/policies#take-down-policy) needs to be modified which is here:

jupiter/app/views/static_pages/policies.en.html.erb

Line 61 in d8bda60

<h2 id="take-down-policy">ERA Take-Down Policy</h2>

The new text to add to the policy is below:

From time to time, new digital environments emerge which are more well-suited to content which has been deposited in ERA. When this occurs, we will work with depositors and communities to create successful migration experiences to these new environments and ensure that our Library's commitment to outstanding service guides our work. We will always weigh these decisions carefully and design migration plans in consideration of any affected end-users and communities.

[pgwillia]

In production