update profile doc string

[stephkyou]

Updates profile doc string to reflect correct dolt profile add behavior.

[github-actions]

@coffeegoddd DOLT

name	add_cnt	delete_cnt	update_cnt	latency
adds_only	60000	0	0	0.93
adds_updates_deletes	60000	60000	60000	5.14
deletes_only	0	60000	0	2.46
updates_only	0	0	60000	3.32

[github-actions]

@coffeegoddd DOLT

test_name	detail	row_cnt	sorted	mysql_time	sql_mult	cli_mult
batching	LOAD DATA	10000	1	0.06	0.83
batching	batch sql	10000	1	0.08	1.88
batching	by line sql	10000	1	0.08	2
blob	1 blob	200000	1	1.14	3.44	3.71
blob	2 blobs	200000	1	1.13	4.29	4.58
blob	no blob	200000	1	1.12	1.44	1.42
col type	datetime	200000	1	1.04	1.88	1.95
col type	varchar	200000	1	0.87	2.05	2.05
config width	2 cols	200000	1	0.95	1.44	1.39
config width	32 cols	200000	1	2.17	1.68	2.28
config width	8 cols	200000	1	1.18	1.57	1.72
pk type	float	200000	1	1.07	1.3	1.3
pk type	int	200000	1	0.95	1.41	1.43
pk type	varchar	200000	1	1.81	1.1	1.03
row count	1.6mm	1600000	1	7.29	1.6	1.54
row count	400k	400000	1	1.84	1.62	1.46
row count	800k	800000	1	3.66	1.64	1.49
secondary index	four index	200000	1	4.59	1.14	0.97
secondary index	no secondary	200000	1	1.11	1.47	1.46
secondary index	one index	200000	1	1.41	1.64	1.56
secondary index	two index	200000	1	2.5	1.33	1.16
sorting	shuffled 1mm	1000000	0	6.61	2.07	1.92
sorting	sorted 1mm	1000000	1	6.53	2.02	1.91

[github-actions]

@coffeegoddd DOLT

name	mean	mean_mult
dolt_blame_basic	36.13	1.37
dolt_blame_commit_filter	249.87	2.8
dolt_commit_ancestors_commit_filter	0.44	0.85
dolt_commits_commit_filter	0.52	1.08
dolt_diff_log_join_from_commit	134.77	1.61
dolt_diff_log_join_to_commit	131.12	1.57
dolt_diff_table_from_commit_filter	0.87	1.21
dolt_diff_table_to_commit_filter	0.83	1.17
dolt_diffs_commit_filter	0.54	1.1
dolt_history_commit_filter	0.79	1.46
dolt_log_commit_filter	0.45	0.94