docs: Fixed a simple typo (#337)

avalible -> available

Author: TristanCms

docs/_docs/the-basics/object-spawning.md

@@ -16,7 +16,7 @@ The .Spawn() method takes 2 parameters, both with default values, so they are op
 ```csharp
 public void Spawn(Stream spawnPayload = null, bool destroyWithScene = false);
 ```
-The first parameter is a System.IO.Stream and can be retrieved in the NetworkStart() to sync values once when spawning this object. Note however, that the payload data is only avalible for people that get the spawn call straight away. People that join later on won't get the payload data.
+The first parameter is a System.IO.Stream and can be retrieved in the NetworkStart() to sync values once when spawning this object. Note however, that the payload data is only available for people that get the spawn call straight away. People that join later on won't get the payload data.
 
 The second parameter speaks for itself. If set to true, the object will be destroyed on scene switching. This can only be set inside the spawn call.