update changelog

CHANGELOG.md

@@ -1,5 +1,12 @@
 ## Updates
 
+#### 18-Sep-2023
+
+- PR https://github.com/floooh/sokol/pull/893 has been merged, this fixes a small issue
+  in the GL backend when using an injected texture as framebuffer texture.
+- Issue https://github.com/floooh/sokol/issues/884 has been fixed via PR https://github.com/floooh/sokol/pull/894,
+  this adds missing error code paths in the Metal backend when Metal object creation fails.
+
 #### 17-Sep-2023
 
 - The sokol-gfx Metal backend now adds debug labels to Metal resource objects and