Update GitHub actions (#352)

* Update GitHub actions

* Downgrade rust-toolchain to the latest stable version (1.74.0) from 1.80.0

* Fix issues with latest clippy

* Fix rustdoc check issue

* Update Rust toolchain in Dockerfile

Author: esteve

rosidl_runtime_rs/src/string.rs

@@ -250,7 +250,7 @@ macro_rules! string_impl {
 
         impl PartialOrd for $string {
             fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
-                self.deref().partial_cmp(other.deref())
+                Some(self.cmp(other))
             }
         }
 

rosidl_runtime_rs/src/string/serde.rs

@@ -125,7 +125,7 @@ impl Serialize for WString {
     {
         // Not particularly efficient
         // SAFETY: See the Display implementation.
-        let u16_slice = unsafe { std::slice::from_raw_parts(self.data as *mut u16, self.size) };
+        let u16_slice = unsafe { std::slice::from_raw_parts(self.data, self.size) };
         let s = std::string::String::from_utf16_lossy(u16_slice);
         serializer.serialize_str(&s)
     }