Rename Serialized Variables Without Losing Inspector Data

The Tip: Renaming a `public` or `[SerializeField]` variable normally breaks Unity’s serialization, resetting Inspector values back to defaults.

How to Use: Add the `[FormerlySerializedAs]` attribute above the variable referencing the old parameter name. Once Unity updates and saves the serialized data in the Editor, the attribute can safely be removed.

```csharp
using UnityEngine;
using UnityEngine.Serialization;

public class PlayerController : MonoBehaviour
{
    [FormerlySerializedAs("playerSpeed")]
    [SerializeField] private float moveSpeed = 5.0f;
}