Add missing value for aggregation_type in CustomerChargeUsageObject

[algra4]

The weighted_sum_agg and latest_agg were missing into the CustomerChargeUsageObject.

These missing values cause errors during the deserialization process.

[rsempe]

Thanks @algra4, can you update src/schemas/CustomerChargeUsageObject.yaml accordingly and then run npm run build?

[algra4]

Hello @rsempe,

I made the required change