Update Rulebook BV Mod for Base 10 from Old Base 5

[duelist]

Simple job check if the rulebook has any mentions of BV mod being set to only 1-5. If so update so that the following is the new scale:

BV BV mod

1	0.9
2	0.9
3	1
4	1
5	1.1
6	1.1
7	1.2
8	1.2
9	1.3
10	1.3