patch 8.2.2936: Vim9: converting number to bool uses wrong stack offset

Problem:    Vim9: converting number to bool uses wrong stack offset. (Salman
            Halim)
Solution:   Include the offset in the 2BOOL command.
diff --git a/src/testdir/test_vim9_disassemble.vim b/src/testdir/test_vim9_disassemble.vim
index c4482a5..f266cbe 100644
--- a/src/testdir/test_vim9_disassemble.vim
+++ b/src/testdir/test_vim9_disassemble.vim
@@ -1650,11 +1650,11 @@
         '\d STORE $0\_s*' ..
         'var invert = !flag\_s*' ..
         '\d LOAD $0\_s*' ..
-        '\d INVERT (!val)\_s*' ..
+        '\d INVERT -1 (!val)\_s*' ..
         '\d STORE $1\_s*' ..
         'var res = !!flag\_s*' ..
         '\d LOAD $0\_s*' ..
-        '\d 2BOOL (!!val)\_s*' ..
+        '\d 2BOOL -1 (!!val)\_s*' ..
         '\d STORE $2\_s*',
         instr)
   assert_equal(true, InvertBool())