message: Update RELEASE_NOTES for 1.9.7
diff: @@ -5,8 +5,16 @@ A new header is inserted each time a *tag* is created.
  ## Next release (main branch)
  +## v1.9.8
  +
  ## v1.9.7
  +- Vulkan: improvements to the ReadPixels implementation.
  +- Vulkan: warn instead of panic for sampler overflow.
  +- Vulkan: fix leak with headless swap chain.
  +- PlatformVkLinux now supports all combos of XLIB and XCB.
  +- Fix TypeScript binding for TextureUsage.
  +
  ## v1.9.6
  - Added View::setVsmShadowOptions (experimental)
  