Update exterheads

Author: HSGamer

content/addon/exterheads/_index.md

@@ -47,3 +47,41 @@ head-item:
   - ""
   - "&7This is a head item from HeadDB"
 ```
+
+## [zHead](https://www.spigotmc.org/resources/zhead-database-plugin-for-heads.115717/)
+
+### Format
+
+```yaml
+zhead: <head-id>
+```
+
+### Example
+
+```yaml
+head-item:
+  zhead: 1
+  name: "&czHead"
+  lore:
+  - ""
+  - "&7This is a head item from zHead"
+```
+
+## [Skulls](https://www.spigotmc.org/resources/skulls-the-ultimate-head-database.90098/)
+
+### Format
+
+```yaml
+skulls: <head-id>
+```
+
+### Example
+
+```yaml
+head-item:
+  skulls: 1
+  name: "&cSkulls"
+  lore:
+  - ""
+  - "&7This is a head item from Skulls"
+```