Fix sponsorship url encoding (#10747)

* Fix sponsorship URL HTML encoding

Co-authored-by: kzu <[email protected]>

* Remove sponsorship view regression test

Co-authored-by: kzu <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: kzu <[email protected]>

Author: 3 people

src/NuGetGallery/Views/Packages/DisplayPackage.cshtml

@@ -1314,7 +1314,7 @@
                                 {
                                     <div class="external-link-container">
                                         <i class="ms-Icon ms-Icon--Link sidebar-link-icon" aria-hidden="true"></i>
-                                        <a href="@sponsorshipUrl" target="_blank" rel="nofollow noopener noreferrer" class="sidebar-link" data-sponsorship-url="@Html.Raw(Json.Encode(sponsorshipUrl))">
+                                        <a href="@sponsorshipUrl" target="_blank" rel="nofollow noopener noreferrer" class="sidebar-link" data-sponsorship-url="@Json.Encode(sponsorshipUrl)">
                                             @sponsorshipUrl
                                         </a>
                                     </div>