Add missing key and remove unused key

source/_components/sensor.fints.markdown

@@ -25,8 +25,7 @@ For each account you have with the bank, a separate sensor is created. If you ha
 # Example configuration.yaml entry
 sensor:
   - platform: fints
-   sensors:
-    - bank_identification_number: ID_FOR_YOUR_BANK
+    bank_identification_number: ID_FOR_YOUR_BANK
     username: YOUR_FINTS_USERNAME
     pin: YOUR_PIN
     url: URL_FOR_YOUR_BANK
@@ -34,13 +33,8 @@ sensor:
 {% endraw %}
 
 {% configuration %}
-sensors:
-  description: List of your sensors.
-  required: true
-  type: map
-  keys:
 name:
-      description: (optional) name of the bank.
+  description: Name of the bank.
   required: false
   type: string
 bank_identification_number: 
@@ -60,16 +54,29 @@ sensors:
   required: true
   type: string
 accounts:
-      description: (optional) You can configure with of the accounts of your bank shall be shown in Home Assistant. If this attribute is set, only the accounts listed here are shown. 
+  description: The balance accounts to show. If not set then all accounts will show up.  
   required: false
   type: list
   keys: 
     account:
-          description: For balance accounts use the IBAN of the account for holdings accounts use the classic account number.
+      description: The IBAN of the blance account.
       required: true
       type: string
     name:
-          description: (optional) Use this field to give the account a meaningful name.
+      description: Use this field to give the account a meaningful name.
+      required: false
+      type: string
+holdings:
+  description: The holding accounts of your bank. If not set then all accounts will show up.
+  required: false
+  type: list
+  keys: 
+    account:
+      description: The classic account number.
+      required: true
+      type: string
+    name:
+      description: Use this field to give the account a meaningful name.
       required: false
       type: string 
 {% endconfiguration %}