try to upgrade rust version

Author: goldmedal

datafusion/core/Cargo.toml

@@ -30,7 +30,7 @@ authors = { workspace = true }
 # Specify MSRV here as `cargo msrv` doesn't support workspace version and fails with
 # "Unable to find key 'package.rust-version' (or 'package.metadata.msrv') in 'arrow-datafusion/Cargo.toml'"
 # https://github.com/foresterre/cargo-msrv/issues/590
-rust-version = "1.73"
+rust-version = "1.78"
 
 [lints]
 workspace = true