Mention concerns for "the first person who asks" for ownership transfer (#7361)

Author: Marcono1234

app/templates/policies.hbs

@@ -82,6 +82,11 @@
     [email protected] for it.
   </blockquote>
 
+  <p>
+    Keep in mind that the new owner might develop your crate in a way you never intended it, or might completely
+    repurpose your crate. Transferring the crate to a malicious user could have a significant impact for any
+    existing users of your crate.</p>
+
   <p>The crates.io team may delete crates from the registry that do not comply with the policies on this document. In
     larger cases of squatting attacks this may happen without prior notification to the author, but in most cases the team
     will first give the author the chance to justify the purpose of the crate.</p>