feat: add title attr to donation iframe

Author: coseeian

src/components/DonorBoxWidget/index.astro

@@ -5,6 +5,7 @@
   <iframe
     src="https://donorbox.org/embed/support-the-processing-foundation?hide_donation_meter=true"
     name="donorbox"
+    title="Processing Foundation Donation Form"
     allowpaymentrequest="allowpaymentrequest"
     seamless="seamless"
     scrolling="no"