Updated data-formats.md

[kgaonkar6]

What documentation should be updated and why?

doc/data-formats.md

What changes need to be made? Please provide enough detail for another participant to make the update.

I believe the documentation for CN/ploidy interpretation here needs to be updated to include the deep deletion and amplification status.

Ploidy	Copy Number	Gain/Loss Interpretation
2	0	Deep deletion; homozygous deletion
2	1	Loss; hemizygous deletion
2	2	Copy neutral
2	3	Gain; one copy gain
2	4	Gain; two copy gain
2	5+	Amplification; possible amplification
3	0	Deep deletion; 3 copy loss
3	1	Loss; 2 copy loss
3	2	Loss; 1 copy loss
3	3	Copy neutral
3	4	Gain; one copy gain
3	5	Gain; two copy gain
3	6	Gain; three copy gain
3	7+	Amplification; possible amplification
4	0	Deep deletion; 4 copy loss
4	1	Loss; 3 copy loss
4	2	Loss; 2 copy loss
4	3	Loss; 1 copy loss
4	4	Copy neutral
4	5	Gain; one copy gain
4	6	Gain; two copy gain
4	7	Gain; two copy gain
4	8+	Amplification; possible amplification

[kgaonkar6]

Closing with #1157