fix smol_str compilation error

the command 'cargo build --no-default-features --features borsh' failed with:
error[E0599]: no function or associated item named 'other' found for struct 'borsh::io::Error' in the current scope
   --> lib/smol_str/src/borsh.rs:33:39
    |
 33 |                 .ok_or_else(|| Error::other("u8::vec_from_reader unexpectedly returned None"))?;
    |                                       ^^^^^ function or associated item not found in 'borsh::io::Error'
    |

Author: alexanderkjall

lib/smol_str/src/borsh.rs

@@ -29,8 +29,9 @@ impl BorshDeserialize for SmolStr {
             }))
         } else {
             // u8::vec_from_reader always returns Some on success in current implementation
-            let vec = u8::vec_from_reader(len, reader)?
-                .ok_or_else(|| Error::other("u8::vec_from_reader unexpectedly returned None"))?;
+            let vec = u8::vec_from_reader(len, reader)?.ok_or_else(|| {
+                Error::new(ErrorKind::Other, "u8::vec_from_reader unexpectedly returned None")
+            })?;
             Ok(SmolStr::from(String::from_utf8(vec).map_err(|err| {
                 let msg = err.to_string();
                 Error::new(ErrorKind::InvalidData, msg)