Score: update notional strategy audit dimension

[storm0x]

Security audit score can be updated from 5 to 4 here:

https://github.com/yearn/yearn-watch/blob/f89995242af34da5eb372b4d7528592923ff70d8/src/utils/config/risk-framework.json#L505

Will publish the report in yearn security shortly.

[Facu]

PR updated it