docs(install): make clipboard compatibility more explicit

Author: Alvaro-Kothe

doc/source/getting_started/install.rst

@@ -340,12 +340,12 @@ Clipboard
 
 Installable with ``pip install "pandas[clipboard]"``.
 
-======================================================================================================================================== ================== =============== ==============
-Dependency                                                                                                                               Minimum Version    pip extra       Notes
-======================================================================================================================================== ================== =============== ==============
-`PyQt5 <https://pypi.org/project/PyQt5/>`__/`PyQt6 <https://pypi.org/project/PyQt6/>`__                                                  5.15.9             clipboard       Clipboard I/O
-`qtpy <https://github.com/spyder-ide/qtpy>`__                                                                                            2.3.0              clipboard       Clipboard I/O
-======================================================================================================================================== ================== =============== ==============
+======================================================================================== ================== =============== ==============
+Dependency                                                                               Minimum Version    pip extra       Notes
+======================================================================================== ================== =============== ==============
+`PyQt5 <https://pypi.org/project/PyQt5/>`__/`PyQt6 <https://pypi.org/project/PyQt6/>`__  5.15.9/6.7.1       clipboard       Clipboard I/O
+`qtpy <https://github.com/spyder-ide/qtpy>`__                                            2.3.0              clipboard       Clipboard I/O
+======================================================================================== ================== =============== ==============
 
 .. note::