Correct the environmental variable for beta password.

Author: DeprecatedLuke

README.md

@@ -173,7 +173,7 @@ helm install satisfactory k8s-at-home/satisfactory -f values.yaml
 | `SKIPUPDATE`            |  `false`  | avoid updating the game on container start/restart        |
 | `STEAMBETA`             |  `false`  | set experimental game version                             |
 | `STEAMBETAID`           | `tech-su` | set a custom beta game version                            |
-| `STEAMBETAPASSWORD`     |  `false`  | set password for beta game version                        |
+| `STEAMBETAKEY`          | `passwd`  | set password for the beta game version                    |
 | `TIMEOUT`               |   `30`    | set client timeout (in seconds)                           |
 | `VMOVERRIDE`            |  `false`  | skips the CPU model check (should not ordinarily be used) |