Update HTTP request pipeline config remarks (#36421)

Author: guardrex

aspnetcore/blazor/tutorials/movie-database-app/part-1.md

@@ -286,9 +286,9 @@ var app = builder.Build();
 
 Next, the HTTP request pipeline is configured.
 
-In the development environment:
+When the app isn't running in the `Development` environment:
 
-* Exception Handler Middleware (<xref:Microsoft.AspNetCore.Builder.ExceptionHandlerExtensions.UseExceptionHandler%2A>) processes errors and displays a developer exception page during development app runs.
+* Exception Handler Middleware (<xref:Microsoft.AspNetCore.Builder.ExceptionHandlerExtensions.UseExceptionHandler%2A>) processes errors and displays a custom error page.
 * [HTTP Strict Transport Security Protocol (HSTS) Middleware](xref:security/enforcing-ssl#http-strict-transport-security-protocol-hsts) (<xref:Microsoft.AspNetCore.Builder.HstsBuilderExtensions.UseHsts%2A>) processes [HSTS](https://cheatsheetseries.owasp.org/cheatsheets/HTTP_Strict_Transport_Security_Cheat_Sheet.html).
 
 ```csharp