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/Get Scan Settings.yml

@@ -19,22 +19,22 @@ settings:
 
 docs: |-
   ## Get Scan Settings
-    
+
     Retrieves the user's current library scanning settings.
-    
+
     **Method:** GET
-    
-    **Endpoint:** /api/library/scan-settings
-    
+
+    **Endpoint:** /api/libraries/scan-settings
+
     **Authentication:** Required (Bearer token)
-    
+
     **Response:**
     - `scan_frequency_minutes` (number): Minutes between automatic scans (minimum 1)
     - `auto_scan_enabled` (boolean): Whether automatic scanning is enabled
     - `last_scan_at` (string, optional): Timestamp of last scan
     - `next_scan_at` (string, optional): Timestamp of next scheduled scan
     - `library_id` (string, optional): Library ID for context
-    
+
     **Status Codes:**
     - 200: Success
     - 401: Unauthorized