Update ui test suite to nightly-2025-08-03

Author: dtolnay

tests/ui/consider-restricting.stderr

@@ -1,3 +1,11 @@
+warning: unused variable: `url`
+  --> tests/ui/consider-restricting.rs:16:41
+   |
+16 |     async fn publish<T: IntoUrl>(&self, url: T) {}
+   |                                         ^^^ help: if this is intentional, prefix it with an underscore: `_url`
+   |
+   = note: `#[warn(unused_variables)]` on by default
+
 error: future cannot be sent between threads safely
   --> tests/ui/consider-restricting.rs:16:49
    |
@@ -9,12 +17,18 @@ note: captured value is not `Send`
    |
 16 |     async fn publish<T: IntoUrl>(&self, url: T) {}
    |                                         ^^^ has type `T` which is not `Send`
-   = note: required for the cast from `Pin<Box<{async block@$DIR/tests/ui/consider-restricting.rs:16:49: 16:51}>>` to `Pin<Box<(dyn Future<Output = ()> + Send + 'async_trait)>>`
+   = note: required for the cast from `Pin<Box<{async block@$DIR/tests/ui/consider-restricting.rs:16:49: 16:51}>>` to `Pin<Box<dyn Future<Output = ()> + Send>>`
 help: consider further restricting type parameter `T` with trait `Send`
    |
 16 |     async fn publish<T: IntoUrl + std::marker::Send>(&self, url: T) {}
    |                                 +++++++++++++++++++
 
+warning: unused variable: `url`
+  --> tests/ui/consider-restricting.rs:23:32
+   |
+23 |     async fn publish<T>(&self, url: T) {}
+   |                                ^^^ help: if this is intentional, prefix it with an underscore: `_url`
+
 error: future cannot be sent between threads safely
   --> tests/ui/consider-restricting.rs:23:40
    |
@@ -26,7 +40,7 @@ note: captured value is not `Send`
    |
 23 |     async fn publish<T>(&self, url: T) {}
    |                                ^^^ has type `T` which is not `Send`
-   = note: required for the cast from `Pin<Box<{async block@$DIR/tests/ui/consider-restricting.rs:23:40: 23:42}>>` to `Pin<Box<(dyn Future<Output = ()> + Send + 'async_trait)>>`
+   = note: required for the cast from `Pin<Box<{async block@$DIR/tests/ui/consider-restricting.rs:23:40: 23:42}>>` to `Pin<Box<dyn Future<Output = ()> + Send>>`
 help: consider further restricting type parameter `T` with trait `Send`
    |
 23 |     async fn publish<T + std::marker::Send>(&self, url: T) {}