Incorrect Call input ports in docs.

[aborgna-q]

The Call operation is defined as:

hugr/src/ops/dataflow.rs

Lines 133 to 137 in 968c8b0

	/// Call a function directly.
	///
	/// The first ports correspond to the signature of the function being
	/// called. Immediately following those ports, the first input port is
	/// connected to the def/declare block with a `ConstE<Graph>` edge.

However, it's dataflow input is just the called function's signature

hugr/src/ops/dataflow.rs

Lines 152 to 154 in 968c8b0

	fn signature(&self) -> FunctionType {
	self.signature.clone()
	}

And only after those ports comes the static_port with the called function (hard-coded in OpType::other_static_input.

hugr/src/ops.rs

Lines 187 to 194 in 968c8b0

	/// If the op has a static input (Call and LoadConstant), the port of that input.
	pub fn static_input_port(&self) -> Option<IncomingPort> {
	match self {
	OpType::Call(call) => Some(call.called_function_port()),
	OpType::LoadConstant(l) => Some(l.constant_port()),
	_ => None,
	}
	}