Change btn class for delete button (#24002)

Set delete account button as a secondary action instead of a primary action.

src/Identity/UI/src/Areas/Identity/Pages/V4/Account/Manage/PersonalData.cshtml

@@ -17,7 +17,7 @@
             <button class="btn btn-primary" type="submit">Download</button>
         </form>
         <p>
-            <a id="delete" asp-page="DeletePersonalData" class="btn btn-primary">Delete</a>
+            <a id="delete" asp-page="DeletePersonalData" class="btn btn-secondary">Delete</a>
         </p>
     </div>
 </div>