Move the endianness notes introduced with #4035 to wasmtime_val_raw. (#5303)

It seems they were mistakenly added to the `wasmtime_valunion` union whereas it is actually the `ValRaw` Rust type (represented by `wasmtime_val_raw`) that is affected by the change.

crates/c-api/include/wasmtime/val.h

@@ -119,38 +119,24 @@ typedef uint8_t wasmtime_v128[16];
  */
 typedef union wasmtime_valunion {
   /// Field used if #wasmtime_val_t::kind is #WASMTIME_I32
-  ///
-  /// Note that this field is always stored in a little-endian format.
   int32_t i32;
   /// Field used if #wasmtime_val_t::kind is #WASMTIME_I64
-  ///
-  /// Note that this field is always stored in a little-endian format.
   int64_t i64;
   /// Field used if #wasmtime_val_t::kind is #WASMTIME_F32
-  ///
-  /// Note that this field is always stored in a little-endian format.
   float32_t f32;
   /// Field used if #wasmtime_val_t::kind is #WASMTIME_F64
-  ///
-  /// Note that this field is always stored in a little-endian format.
   float64_t f64;
   /// Field used if #wasmtime_val_t::kind is #WASMTIME_FUNCREF
   ///
   /// If this value represents a `ref.null func` value then the `store_id` field
   /// is set to zero.
-  ///
-  /// Note that this field is always stored in a little-endian format.
   wasmtime_func_t funcref;
   /// Field used if #wasmtime_val_t::kind is #WASMTIME_EXTERNREF
   ///
   /// If this value represents a `ref.null extern` value then this pointer will
   /// be `NULL`.
-  ///
-  /// Note that this field is always stored in a little-endian format.
   wasmtime_externref_t *externref;
   /// Field used if #wasmtime_val_t::kind is #WASMTIME_V128
-  ///
-  /// Note that this field is always stored in a little-endian format.
   wasmtime_v128 v128;
 } wasmtime_valunion_t;
 
@@ -169,25 +155,39 @@ typedef union wasmtime_valunion {
  */
 typedef union wasmtime_val_raw {
   /// Field for when this val is a WebAssembly `i32` value.
+  ///
+  /// Note that this field is always stored in a little-endian format.
   int32_t i32;
   /// Field for when this val is a WebAssembly `i64` value.
+  ///
+  /// Note that this field is always stored in a little-endian format.
   int64_t i64;
   /// Field for when this val is a WebAssembly `f32` value.
+  ///
+  /// Note that this field is always stored in a little-endian format.
   float32_t f32;
   /// Field for when this val is a WebAssembly `f64` value.
+  ///
+  /// Note that this field is always stored in a little-endian format.
   float64_t f64;
   /// Field for when this val is a WebAssembly `v128` value.
+  ///
+  /// Note that this field is always stored in a little-endian format.
   wasmtime_v128 v128;
   /// Field for when this val is a WebAssembly `funcref` value.
   ///
   /// If this is set to 0 then it's a null funcref, otherwise this must be
   /// passed to `wasmtime_func_from_raw` to determine the `wasmtime_func_t`.
+  ///
+  /// Note that this field is always stored in a little-endian format.
   size_t funcref;
   /// Field for when this val is a WebAssembly `externref` value.
   ///
   /// If this is set to 0 then it's a null externref, otherwise this must be
   /// passed to `wasmtime_externref_from_raw` to determine the
   /// `wasmtime_externref_t`.
+  ///
+  /// Note that this field is always stored in a little-endian format.
   size_t externref;
 } wasmtime_val_raw_t;