sysrq docs: document sequence that actually works

Document sequence of keypresses that actually works. Yes, this changed
year-or-so ago.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Documentation/sysrq.txt

@@ -43,7 +43,7 @@ On x86   - You press the key combo 'ALT-SysRq-<command key>'. Note - Some
            keyboards may not have a key labeled 'SysRq'. The 'SysRq' key is
            also known as the 'Print Screen' key. Also some keyboards cannot
 	   handle so many keys being pressed at the same time, so you might
-	   have better luck with "press Alt", "press SysRq", "release Alt",
+	   have better luck with "press Alt", "press SysRq", "release SysRq",
 	   "press <command key>", release everything.
 
 On SPARC - You press 'ALT-STOP-<command key>', I believe.