[FIX] payment_paypal: wrong param expected in paypal_urls

Issue was blocking the system to confirm a SO/Invoice after redirection
from paypal.

In V13 is getting the value of the paypal_urls using
paypal_get_form_action_url() returning the correct string, not a dict
anymore.

Closing
opw-2119027
opw-2122833

closes odoo/odoo#40471

X-original-commit: b7f32e6451da75a9583d28686641fc328ab661da
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/payment_paypal/controllers/main.py

@@ -60,15 +60,14 @@ class PaypalController(http.Controller):
         tx = None
         if reference:
             tx = request.env['payment.transaction'].search([('reference', '=', reference)])
-        paypal_urls = tx.acquirer_id.paypal_get_form_action_url()
-        pdt_request = bool(post.get('amt'))  # check for spefific pdt param
+        paypal_url = tx.acquirer_id.paypal_get_form_action_url()
+        pdt_request = bool(post.get('amt'))  # check for specific pdt param
         if pdt_request:
             # this means we are in PDT instead of DPN like before
             # fetch the PDT token
             post['at'] = tx and tx.acquirer_id.paypal_pdt_token or ''
             post['cmd'] = '_notify-synch'  # command is different in PDT than IPN/DPN
-        validate_url = paypal_urls['paypal_form_url']
-        urequest = requests.post(validate_url, post)
+        urequest = requests.post(paypal_url, post)
         urequest.raise_for_status()
         resp = urequest.text
         if pdt_request: