patch 9.1.0942: a few typos were found

Problem:  a few typos were found
Solution: fix them (zeertzjq)

closes: #16232

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_vim9_class.vim b/src/testdir/test_vim9_class.vim
index bea0ec9..75f1b50 100644
--- a/src/testdir/test_vim9_class.vim
+++ b/src/testdir/test_vim9_class.vim
@@ -11306,7 +11306,7 @@
   END
   v9.CheckScriptSuccess(lines)
 
-  # Nested data.  Object containg a Dict containing another Object.
+  # Nested data.  Object containing a Dict containing another Object.
   lines =<< trim END
     vim9script
     class Context