ci: updates for Rust 1.83 (#4741)

Author: Icxolu

tests/ui/invalid_pyfunctions.stderr

@@ -58,6 +58,6 @@ error[E0277]: the trait bound `&str: From<BoundRef<'_, '_, pyo3::types::PyModule
              `String` implements `From<&mut str>`
              `String` implements `From<&str>`
              `String` implements `From<Box<str>>`
-             `String` implements `From<Cow<'a, str>>`
+             `String` implements `From<Cow<'_, str>>`
              `String` implements `From<char>`
    = note: required for `BoundRef<'_, '_, pyo3::types::PyModule>` to implement `Into<&str>`

tests/ui/static_ref.stderr

@@ -5,7 +5,7 @@ error: lifetime may not live long enough
   | ^^^^^^^^^^^^^
   | |
   | lifetime `'py` defined here
-  | cast requires that `'py` must outlive `'static`
+  | coercion requires that `'py` must outlive `'static`
   |
   = note: this error originates in the attribute macro `pyfunction` (in Nightly builds, run with -Z macro-backtrace for more info)
 
@@ -42,6 +42,6 @@ error: lifetime may not live long enough
   | ^^^^^^^^^^^^^
   | |
   | lifetime `'py` defined here
-  | cast requires that `'py` must outlive `'static`
+  | coercion requires that `'py` must outlive `'static`
   |
   = note: this error originates in the attribute macro `pyfunction` (in Nightly builds, run with -Z macro-backtrace for more info)