fix: cargo msrv check failed (apache#13654)

* fix: cargo msrv check failed

* Update comment

Author: jonahgao

datafusion/substrait/Cargo.toml

@@ -42,7 +42,9 @@ object_store = { workspace = true }
 pbjson-types = "0.7"
 # TODO use workspace version
 prost = "0.13"
-substrait = { version = "0.49", features = ["serde"] }
+# The MSRV of substrait@0.49.5 is 1.80.1, which is higher than ours.
+# TODO: Update this version constraint when DataFusion updates its MSRV.
+substrait = { version = ">=0.49.0, <0.49.5", features = ["serde"] }
 url = { workspace = true }
 
 [dev-dependencies]