Note correct deprecation version for sphinx.util.osutil.cd

Author: AA-Turner

CHANGES

@@ -23,6 +23,7 @@ Deprecated
 ----------
 
 * #11247: Deprecate the legacy ``intersphinx_mapping`` format
+* ``sphinx.util.osutil.cd`` is deprecated in favour of ``contextlib.chdir``.
 
 Features added
 --------------

doc/extdev/deprecated.rst

@@ -23,7 +23,7 @@ The following is a list of deprecated interfaces.
      - Alternatives
 
    * - ``sphinx.util.osutil.cd``
-     - 6.1
+     - 6.2
      - 8.0
      - ``contextlib.chdir``