Update ui test suite to nightly-2023-02-01

Author: dtolnay

tests/ui/self-span.stderr

@@ -2,7 +2,7 @@ error[E0308]: mismatched types
   --> tests/ui/self-span.rs:17:21
    |
 17 |         let _: () = self;
-   |                --   ^^^^ expected `()`, found struct `S`
+   |                --   ^^^^ expected `()`, found `S`
    |                |
    |                expected due to this
 
@@ -16,7 +16,7 @@ error[E0308]: mismatched types
   --> tests/ui/self-span.rs:25:21
    |
 25 |         let _: () = self;
-   |                --   ^^^^ expected `()`, found enum `E`
+   |                --   ^^^^ expected `()`, found `E`
    |                |
    |                expected due to this