Documentation: kgdb: Correct parameter error

Module kgdb had been converted to debug_core since commit c433820971ff
("Move kernel/kgdb.c to kernel/debug/debug_core.c") be added, so let's
correct the module parameter path.

Fixes: c433820971ff ("Move kernel/kgdb.c to kernel/debug/debug_core.c")
Signed-off-by: Changhuang Liang <[e-mail]>
Reviewed-by: Douglas Anderson <[e-mail]>
Reviewed-by: Daniel Thompson <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

Documentation/dev-tools/kgdb.rst

···
 
 2. Use sysfs before configuring an I/O driver::
 
-	echo 1 > /sys/module/kgdb/parameters/kgdb_use_con
+	echo 1 > /sys/module/debug_core/parameters/kgdb_use_con
 
 .. note::