Update csp_whitelist.xml

Refused to frame 'https://www.paypalobjects.com/' because it violates the following Content Security Policy directive:

Author: in-session

app/code/Magento/Paypal/etc/csp_whitelist.xml

@@ -38,6 +38,7 @@
                 <value id="www_sandbox_paypal" type="host">www.sandbox.paypal.com</value>
                 <value id="www_pilot_payflowlink_paypal" type="host">pilot-payflowlink.paypal.com</value>
                 <value id="pilot_payflowlink_paypal_com" type="host">pilot-payflowlink.paypal.com</value>
+                <value id="paypal_objects" type="host">www.paypalobjects.com</value>
             </values>
         </policy>
         <policy id="font-src">