Consider using WeakBoundedVec for CompletedProjects

[f-gate]

Found this nice bit of code in the runtime, since CompletedProjects ofc only gets called when a project is completed its not prone to attack (WHY NOT?). And since reaching the bound on CompletedProjects isnt actually an error this warning should suffice.

if locks.len() as u32 > T::MaxLocks::get() {
	log::warn!(
		target: LOG_TARGET,
		"Warning: A user has more currency locks than expected. \
		A runtime configuration adjustment may be needed."
	);
}