Potential fix for pull request finding 'Generic catch clause'

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

Author: KrzysztofPajak

src/Web/Grand.Web.Store/Controllers/CustomerController.cs

@@ -368,7 +368,7 @@ public async Task<IActionResult> Delete(string id)
             Error(ModelState);
             return RedirectToAction("Edit", new { id = customer.Id });
         }
-        catch (Exception exc)
+        catch (GrandException exc)
         {
             Error(exc.Message);
             return RedirectToAction("Edit", new { id = customer.Id });