update readme and changelog

CHANGELOG.md

@@ -1,5 +1,19 @@
 ## Updates
 
+### 19-Jun-2024
+
+Bugfix in the sokol_gfx.h D3D11 backend: calling `sg_update_image()` for a
+small-ish 3D texture didn't take the 'depth pitch' into account which then
+caused invalid texture content. This happened at a specific size cutoff which
+is CPU specific (on my laptop with integrated Intel GPU only for textures
+smaller than 32x32xN).
+
+Related ticket: https://github.com/floooh/sokol/issues/1066
+...and PR: https://github.com/floooh/sokol/pull/1065
+
+I also wrote a new sample for investigating the issue and to protect from
+future regressions: https://floooh.github.io/sokol-html5/dyntex3d-sapp.html
+
 ### 01-Jun-2024
 
 sokol_imgui.h is now officially supported in the [sokol-zig bindings](https://github.com/floooh/sokol-zig).

README.md

@@ -6,7 +6,7 @@
 
 # Sokol
 
-[**See what's new**](https://github.com/floooh/sokol/blob/master/CHANGELOG.md) (**09-May-2024**: **BREAKING CHANGES** 'storage buffer support' in sokol_gfx.h
+[**See what's new**](https://github.com/floooh/sokol/blob/master/CHANGELOG.md) (**19-Jun-2024**: bugfix in the sokol_gfx.h d3d11 backend when updating 3d textures
 
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