Inefficient vector capacity

In the function keccak_inputs_from_ubv_instances in the file circuits/src/keccak/utils.rs, there is the following vector defined with capacity:

let mut keccak_inputs =
    Vec::with_capacity(ubv_instances.len() * inputs_per_proof);

However, keccak_inputs will ultimately have ubv_instances.len() * inner_batch_size elements. Thus, if inputs_per_proof < inner_batch_size, additional allocations will need to be performed. If instead inputs_per_proof > inner_batch_size, then an unnecessary amount of memory will be allocated for this vector. We thus recommend to change the allocated capacity:

let mut keccak_inputs =
-     Vec::with_capacity(ubv_instances.len() * inputs_per_proof);
+     Vec::with_capacity(ubv_instances.len() * inner_batch_size);