Step 5 fix: add apply to core-renames

core-trampoline calls apply internally. In compile mode, apply must
be in core-renames for the compiler to emit a direct call to
core-apply. Without this, apply resolves to nil at compile time.

src/jolt/compiler.janet

@@ -98,6 +98,7 @@
     "drop-while" "core-drop-while"
     "nth" "core-nth"
     "mapcat" "core-mapcat"
+    "apply" "core-apply"
     "trampoline" "core-trampoline"
     "list" "core-list"
     "name" "core-name"