Change boolean size to 1 byte

codegen/array/snippets/extend_capped

@@ -9,7 +9,7 @@
   // MSVC Spectre mitigation warnings
   u64 items_to_add = other->count;
   u64 item_index   = 0;
-  b32 running      = true;
+  b8 running      = true;
   while (running) {{
     item = wapp_{Tlower}_array_get(other, item_index);
     ++item_index;