Point to the "Help" button instead of the "Beta" button for feedback.

The "Beta" button was removed a while ago, so the old text is now
misleading.  Also changed it to double quotes to be consistent with
other use cases.

Change-Id: I4ccb53fea02d1029fce2d8d0f7ba8613e8672fe7
Merge "Point to the "Help" button instead of the "Beta" button for feedback."