Set date of last update correctly for posts (#254)

blog/post/04-printing-to-screen.md

@@ -1,7 +1,7 @@
 +++
 title = "Printing to Screen"
 date = "2015-10-23"
-updated = "2016-10-06"
+updated = "2016-10-31"
 aliases = [
     "/2015/10/23/printing-to-screen/",
     "/rust-os/printing-to-screen.html",

blog/post/10-better-exception-messages.md

@@ -1,6 +1,7 @@
 +++
 title = "Better Exception Messages"
 date = "2016-08-03"
+updated = "2016-11-01"
 +++
 
 In this post, we explore exceptions in more detail. Our goal is to print additional information when an exception occurs, for example the values of the instruction and stack pointer. In the course of this, we will explore inline assembly and naked functions. We will also add a handler function for page faults and read the associated error code.

blog/post/11-returning-from-exceptions.md

@@ -1,6 +1,7 @@
 +++
 title = "Returning from Exceptions"
 date = "2016-09-21"
+updated = "2016-11-01"
 +++
 
 In this post, we learn how to return from exceptions correctly. In the course of this, we will explore the `iretq` instruction, the C calling convention, multimedia registers, and the red zone.