Update zjit/src/codegen.rs

Co-authored-by: Takashi Kokubun <takashikkbn@gmail.com>

Author: st0012

zjit/src/codegen.rs

@@ -1707,7 +1707,7 @@ fn gen_push_frame(asm: &mut Assembler, argc: usize, state: &FrameState, frame: C
     asm.mov(cfp_opnd(RUBY_OFFSET_CFP_BLOCK_CODE), 0.into());
 }
 
-// Stack overflow check: fails if CFP<=SP at any point in the callee.
+/// Stack overflow check: fails if CFP<=SP at any point in the callee.
 fn gen_stack_overflow_check(jit: &mut JITState, asm: &mut Assembler, state: &FrameState, stack_growth: usize) {
     asm_comment!(asm, "stack overflow check");
     // vm_push_frame() checks it against a decremented cfp, and CHECK_VM_STACK_OVERFLOW0