lib/Kconfig.debug: correct documentation paths

A bunch of documentation files have moved, correct the paths.
Signed-off-by: Hans Holmberg <hans@pixelmunchies.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

lib/Kconfig.debug

@@ -130,7 +130,8 @@ config DYNAMIC_DEBUG
 		nullarbor:~ # echo -n 'func svc_process -p' >
 						<debugfs>/dynamic_debug/control
 
-	  See Documentation/dynamic-debug-howto.txt for additional information.
+	  See Documentation/admin-guide/dynamic-debug-howto.rst for additional
+	  information.
 
 endmenu # "printk and dmesg options"
 
@@ -404,8 +405,8 @@ config MAGIC_SYSRQ
 	  by pressing various keys while holding SysRq (Alt+PrintScreen). It
 	  also works on a serial console (on PC hardware at least), if you
 	  send a BREAK and then within 5 seconds a command keypress. The
-	  keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
-	  unless you really know what this hack does.
+	  keys are documented in <file:Documentation/admin-guide/sysrq.rst>.
+	  Don't say Y unless you really know what this hack does.
 
 config MAGIC_SYSRQ_DEFAULT_ENABLE
 	hex "Enable magic SysRq key functions by default"
@@ -414,7 +415,7 @@ config MAGIC_SYSRQ_DEFAULT_ENABLE
 	help
 	  Specifies which SysRq key functions are enabled by default.
 	  This may be set to 1 or 0 to enable or disable them all, or
-	  to a bitmask as described in Documentation/sysrq.txt.
+	  to a bitmask as described in Documentation/admin-guide/sysrq.rst.
 
 config MAGIC_SYSRQ_SERIAL
 	bool "Enable magic SysRq key over serial"