update version placeholders

(cherry picked from commit e4840ce59bdddb19394df008c5c26d9c493725f8)

1 files changed, 2 insertions, 2 deletions

diff --git a/library/std/src/io/cursor.rs b/library/std/src/io/cursor.rs
index 606099c8bc6..08832bbc1e3 100644
--- a/library/std/src/io/cursor.rs
+++ b/library/std/src/io/cursor.rs
@@ -153,7 +153,7 @@ impl<T> Cursor<T> {
     /// let reference = buff.get_mut();
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_mut_cursor", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_mut_cursor", since = "1.86.0")]
     pub const fn get_mut(&mut self) -> &mut T {
         &mut self.inner
     }
@@ -201,7 +201,7 @@ impl<T> Cursor<T> {
     /// assert_eq!(buff.position(), 4);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_mut_cursor", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_mut_cursor", since = "1.86.0")]
     pub const fn set_position(&mut self, pos: u64) {
         self.pos = pos;
     }