Update changelog

Changelog

@@ -18,6 +18,8 @@
 Open Source Release <next-release>
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+-   Kernel    [2024-09-XX] New warning category typing:implicit-int, allowing
+              to omit type specifiers in declarations (default is error).
 o!  Kernel    [2024-09-13] Pragma nodes in the AST have been removed
 -   Slicing   [2024-09-13] -slice-pragma is now -slice-annot
 -   Slicing   [2024-09-13] `slice pragma <elem>` is now `slice_preserve_<elem>`