Rollup merge of rust-lang#91782 - maxwase:is_symlink_since_attribute, r=jyn514

Correct since attribute for `is_symlink` feature

Follow-up from [89677](rust-lang#89677)

Author: matthiaskrgr

library/std/src/fs.rs

@@ -1058,7 +1058,7 @@ impl Metadata {
     /// }
     /// ```
     #[must_use]
-    #[stable(feature = "is_symlink", since = "1.57.0")]
+    #[stable(feature = "is_symlink", since = "1.58.0")]
     pub fn is_symlink(&self) -> bool {
         self.file_type().is_symlink()
     }

library/std/src/path.rs

@@ -2817,7 +2817,7 @@ impl Path {
     /// check errors, call [`fs::symlink_metadata`] and handle its [`Result`]. Then call
     /// [`fs::Metadata::is_symlink`] if it was [`Ok`].
     #[must_use]
-    #[stable(feature = "is_symlink", since = "1.57.0")]
+    #[stable(feature = "is_symlink", since = "1.58.0")]
     pub fn is_symlink(&self) -> bool {
         fs::symlink_metadata(self).map(|m| m.is_symlink()).unwrap_or(false)
     }