increase rust version from 1.85 to 1.89

crates/index-scheduler/src/scheduler/create_batch.rs

@@ -66,6 +66,7 @@ pub(crate) enum DocumentOperation {
 
 /// A [batch](Batch) that combines multiple tasks operating on an index.
 #[derive(Debug)]
+#[allow(clippy::large_enum_variant)]
 pub(crate) enum IndexOperation {
     DocumentOperation {
         index_uid: String,

crates/index-scheduler/src/scheduler/process_export.rs

@@ -370,7 +370,7 @@ fn ureq_error_into_error(error: ureq::Error) -> Error {
             }
             Err(e) => e.into(),
         },
-        ureq::Error::Transport(transport) => io::Error::new(io::ErrorKind::Other, transport).into(),
+        ureq::Error::Transport(transport) => io::Error::other(transport).into(),
     }
 }