bin/gen_release_notes.py: bump advertised vulkan version to 1.3

Fixes: df8ac77af8 ("anv: Advertise Vulkan 1.3")
Fixes: 08c6f437cf ("radv: advertise Vulkan 1.3")
Signed-off-by: Eric Engestrom <eric@igalia.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17759>

bin/gen_release_notes.py

@@ -40,7 +40,7 @@ import docutils.utils
 import docutils.parsers.rst.states as states
 
 CURRENT_GL_VERSION = '4.6'
-CURRENT_VK_VERSION = '1.2'
+CURRENT_VK_VERSION = '1.3'
 
 TEMPLATE = Template(textwrap.dedent("""\
     ${header}