Config.in.legacy: recent removals are for the future release

A few package or config removals have been introduced after the 2023.11
release, but there entries were still added to the list of options
removed in 2023.11.

The affected commits are:
    64a5831679 package/libmpd: remove package
    f93380ab1a package/gmpc: remove package
    6d8c7aecbb package/flickcurl: remove package
    f6acde11ab package/onevpl: rename package to libvpl
    fffb245f66 package/linux-headers: drop 6.5.x option

Introduce the 2024.02 section and move the 2023.11 one to where it
belongs.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

Config.in.legacy

@@ -144,7 +144,7 @@ endif
 
 ###############################################################################
 
-comment "Legacy options removed in 2023.11"
+comment "Legacy options removed in 2024.02"
 
 config BR2_PACKAGE_LIBMPD
 	bool "libmpd package was removed"
@@ -179,6 +179,8 @@ config BR2_KERNEL_HEADERS_6_5
 	  Version 6.5.x of the Linux kernel headers are no longer
 	  maintained upstream and are now removed.
 
+comment "Legacy options removed in 2023.11"
+
 config BR2_PACKAGE_PYTHON_PYXB
 	bool "python-pyxb removed"
 	select BR2_LEGACY