Fix link screen reading issue on upload package page and about page (#9903)

Author: Goodyear2017

src/NuGetGallery/Views/Packages/UploadPackage.cshtml

@@ -30,7 +30,7 @@
                     <p class="message">Your package file will be uploaded and hosted on the @(Config.Current.Brand) server (@(Config.Current.SiteRoot)).</p>
                     <p class="message">
                         To learn more about authoring great packages, view our
-                        <a href="https://docs.microsoft.com/nuget/create-packages/package-authoring-best-practices" alt="Best Practices" aria-label="Read here about publishing packages">Best Practices</a> page.
+                        <a href="https://docs.microsoft.com/nuget/create-packages/package-authoring-best-practices">Best Practices</a> page.
                     </p>
                 </div>
 

src/NuGetGallery/Views/Pages/About.cshtml

@@ -48,7 +48,7 @@
                 </li>
             </ul>
             <p>
-                And <a href="https://github.com/NuGet/NuGetGallery/graphs/contributors" aria-label="Read the full list of contributors on GitHub.">many many more!</a>
+                And <a href="https://github.com/NuGet/NuGetGallery/graphs/contributors">many many more!</a>
             </p>
             <div data-bind="template: { name: 'contributor-list-template', data: contributors }"></div>
         </div>