chore: fix toml format to address wasm build failure

crates/connector_configs/toml/sandbox.toml

@@ -1714,6 +1714,7 @@ key2="Certificate Key"
   payment_method_type = "Visa"
 [jpmorgan.connector_auth.BodyKey]
 api_key="Access Token"
+key1="Client Secret"
 
 [klarna]
 [[klarna.pay_later]]
@@ -4374,36 +4375,36 @@ placeholder="Enter locale"
 required=true
 type="Text"
 
-[[ctp_mastercard.metadata.card_brands]]
+[ctp_mastercard.metadata.card_brands]
 name="card_brands"
 label="Card Brands"
 placeholder="Enter Card Brands"
 required=true
 type="MultiSelect"
 options=["visa","mastercard"]
 
-[[ctp_mastercard.metadata.acquirer_bin]]
+[ctp_mastercard.metadata.acquirer_bin]
 name="acquirer_bin"
 label="Acquire Bin"
 placeholder="Enter Acquirer Bin"
 required=true
 type="Text"
 
-[[ctp_mastercard.metadata.acquirer_merchant_id]]
+[ctp_mastercard.metadata.acquirer_merchant_id]
 name="acquirer_merchant_id"
 label="Acquire Merchant Id"
 placeholder="Enter Acquirer Merchant Id"
 required=true
 type="Text"
 
-[[ctp_mastercard.metadata.merchant_category_code]]
+[ctp_mastercard.metadata.merchant_category_code]
 name="merchant_category_code"
 label="Merchant Category Code"
 placeholder="Enter Merchant Category Code"
 required=true
 type="Text"
 
-[[ctp_mastercard.metadata.merchant_country_code]]
+[ctp_mastercard.metadata.merchant_country_code]
 name="merchant_country_code"
 label="Merchant Country Code"
 placeholder="Enter Merchant Country Code"