fix: correct API endpoint path from /api/library/scan-settings to /api/libraries/scan-settings

- Update endpoint path in Get Scan Settings Bruno collection file
- Update endpoint path in Update Scan Settings Bruno collection file
- Update endpoint path in API reference documentation

This corrects a typo in the API path where 'library' was singular instead of plural.

bruno/library/Update Scan Settings.yml

@@ -26,22 +26,22 @@ settings:
 
 docs: |-
   ## Update Scan Settings
-    
+
     Updates the user's media scanning settings.
-    
+
     **Method:** PUT
-    
-    **Endpoint:** /api/library/scan-settings
-    
+
+    **Endpoint:** /api/libraries/scan-settings
+
     **Authentication:** Required
-    
+
     **Request Body:**
     - `scan_frequency_minutes` (integer, required): Minutes between automatic scans (15-1440)
     - `auto_scan_enabled` (boolean, required): Whether automatic scanning is enabled
-    
+
     **Response:**
     - `message` (string): Success message
-    
+
     **Status Codes:**
     - 200: Success
     - 400: Invalid settings