[FAB-9030] Clean up identity.md
[FAB-9030] Clean up identity.md

Wordings, trims.

Change-Id: I6cd38fe16c80c0e4ca34129d4aa3e4d43ae8ed47
Signed-off-by: joe-alewine <fe2d55ddcdde6f951d073228e1f2dc081e79a271@ibm.com>

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