update compile errors for newer Rust

tests-build/tests/fail/macros_type_mismatch.stderr

@@ -43,11 +43,12 @@ error[E0308]: mismatched types
    |
    = note:   expected enum `Result<(), ()>`
            found unit type `()`
-help: try adding an expression at the end of the block
-   |
-23 ~     Ok(());;
-24 +     Ok(())
+help: try wrapping the expression in a variant of `Result`
    |
+23 |     Ok(Ok(());)
+   |     +++       +
+23 |     Err(Ok(());)
+   |     ++++       +
 
 error[E0277]: the `?` operator can only be used in an async block that returns `Result` or `Option` (or another type that implements `FromResidual`)
   --> tests/fail/macros_type_mismatch.rs:40:9
@@ -68,14 +69,10 @@ error[E0308]: mismatched types
    |
    = note:   expected enum `Option<()>`
            found unit type `()`
-help: try adding an expression at the end of the block
-   |
-40 ~     None?;;
-41 +     None
-   |
-40 ~     None?;;
-41 +     Some(())
+help: try wrapping the expression in `Some`
    |
+40 |     Some(None?;)
+   |     +++++      +
 
 error[E0277]: the `?` operator can only be used in an async block that returns `Result` or `Option` (or another type that implements `FromResidual`)
   --> tests/fail/macros_type_mismatch.rs:57:11
@@ -96,11 +93,12 @@ error[E0308]: mismatched types
    |
    = note:   expected enum `Result<(), ()>`
            found unit type `()`
-help: try adding an expression at the end of the block
-   |
-57 ~     Ok(())?;;
-58 +     Ok(())
+help: try wrapping the expression in a variant of `Result`
    |
+57 |     Ok(Ok(())?;)
+   |     +++        +
+57 |     Err(Ok(())?;)
+   |     ++++        +
 
 error[E0308]: mismatched types
   --> tests/fail/macros_type_mismatch.rs:66:5