update changelog (#1048)

CHANGELOG.md

@@ -1,5 +1,14 @@
 ## Updates
 
+### 14-May-2024
+
+sokol_fetch.h: A minor breaking change in which hopefully doesn't affect anybody:
+
+The function typedef `sfetch_callback_t` has been removed and the type signature
+for the callback has been directly embedded in the `sfetch_request_t` struct. This
+is a preparation for adding sokol_fetch.h to the language bindings (first in
+sokol-zig, see this PR for details: https://github.com/floooh/sokol/pull/1048).
+
 ### 13-May-2024
 
 Official bindings for the **D language** have been added, like the other official