docs: note that GPU_BASED_VALIDATION implies VALIDATION

CHANGELOG.md

@@ -90,6 +90,7 @@ Bottom level categories:
 - `wgpu-types`'s `trace` and `replay` features have been replaced by the `serde` feature. By @KirmesBude in [#5149](https://github.com/gfx-rs/wgpu/pull/5149)
 - `wgpu-core`'s `serial-pass` feature has been removed. Use `serde` instead. By @KirmesBude in [#5149](https://github.com/gfx-rs/wgpu/pull/5149)
 - Added `InstanceFlags::GPU_BASED_VALIDATION`, which enables GPU-based validation for shaders. This is currently only supported on the DX12 and Vulkan backends; other platforms ignore this flag, for now.
+  - When set, this flag implies `InstanceFlags::VALIDATION`.
   - This has been added to the set of flags set by `InstanceFlags::debugging` and `InstanceFlags::from_build_config`. If you notice your graphics workloads running more slowly, this may be the culprit.
   - As with other instance flags, this flag can be changed in calls to `InstanceFlags::with_env` with the new `WGPU_GPU_BASED_VALIDATION` environment variable.
 

wgpu-types/src/lib.rs

@@ -904,8 +904,8 @@ bitflags::bitflags! {
         /// This mainly applies to a Vulkan driver's compliance version. If the major compliance version
         /// is `0`, then the driver is ignored. This flag allows that driver to be enabled for testing.
         const ALLOW_UNDERLYING_NONCOMPLIANT_ADAPTER = 1 << 3;
-        /// Enable GPU-based validation. Currently, this only changes behavior on the DX12 and
-        /// Vulkan backends.
+        /// Enable GPU-based validation. Implies [`Self::VALIDATION`]. Currently, this only changes
+        /// behavior on the DX12 and Vulkan backends.
         ///
         /// Supported platforms:
         ///