Bump rust toolchain to use `stdsimd` feature on 1.72.

See: https://github.com/tkaitchuck/aHash/issues/195
Related to: https://github.com/dora-rs/dora/actions/runs/7465955428/job/20316250830

examples/cmake-dataflow/DoraTargets.cmake

@@ -15,7 +15,7 @@ if(DORA_ROOT_DIR)
     )
     FetchContent_MakeAvailable(Corrosion)
     list(PREPEND CMAKE_MODULE_PATH ${Corrosion_SOURCE_DIR}/cmake)
-    find_package(Rust 1.70 REQUIRED MODULE)
+    find_package(Rust 1.72 REQUIRED MODULE)
     corrosion_import_crate(MANIFEST_PATH "${DORA_ROOT_DIR}/Cargo.toml"
         CRATES
         dora-node-api-c

rust-toolchain.toml

@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.70"
+channel = "1.72"
 components = ["rustfmt", "clippy"]