Overloaded `-d` short parameter in `bgpkit-broker search`

[m-appel]

For the bgpkit-broker search CLI command there are two parameters mapping to short -d, --duration and --data-type. I guess one of them should be set to -D (similar to the timestamp parameters).

bgpkit-broker/src/cli/api.rs

Lines 32 to 34 in bef4d31

	/// Duration string, e.g. 1 hour
	#[clap(short = 'd', long)]
	pub duration: Option<String>,

bgpkit-broker/src/cli/api.rs

Lines 44 to 46 in bef4d31

	/// filter by data types, i.e. 'updates', 'rib'.
	#[clap(short, long)]
	pub data_type: Option<String>,