Ender Dragon and Wither spawn eggs don't have a rarity color

The Bug

Despite the Ender Dragon and Wither Spawn Eggs being exclusive to commands their rarity color isn't the magenta color other command only items are.

Reproduce

• Do /give @s ender_dragon_spawn_egg
• Look at the text color

Observed Result

The color was the normal white

Expected Result

The color would be magenta like other command only items