Update config-json.md

Author: DerGoogler

docs/en/guide/mmrl-util/config-json.md

@@ -4,13 +4,9 @@ This JSON configuration file contains settings related to a Magisk repository. B
 
 ---
 
-### `id` <Badge type="warning" text="required af of 1 Jan, 2026" />
+### `id` <Badge type="warning" text="required as of 1 Jan, 2026" /> <Badge type="tip" text="R/O" />
 
-An unique id for your repository
-
-```json
-"id": "gmr"
-```
+An unique id for your repository that cannot be modified when using MMRL-Util
 
 
 ### `name` <Badge type="danger" text="required" />
@@ -93,4 +89,4 @@ Specifies the directory where logs will be stored.
 
 ```json
 "log_dir": "log"
-```
+```