[gparted] Update "Detecting BitLocker" URL code comment

[Curtis Gedak <gedakc src gnome org>]

commit 4a6e79daa34df13410f1427e390de274906ef52d
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Tue Feb 23 14:25:14 2021 +0000

    Update "Detecting BitLocker" URL code comment
    
    The document has moved on the Microsoft website.  Update the URL
    accordingly, and add an Internet Archive URL too, for good measure.

 src/GParted_Core.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/GParted_Core.cc b/src/GParted_Core.cc
index 9a4e2e6f..7841868d 100644
--- a/src/GParted_Core.cc
+++ b/src/GParted_Core.cc
@@ -1119,7 +1119,8 @@ FSType GParted_Core::detect_filesystem_internal(const Glib::ustring& path, Byte_
        // For simple BitLocker recognition consider validation of BIOS Parameter block
        // fields unnecessary.
        // *   Detecting BitLocker
-       //     http://blogs.msdn.com/b/si_team/archive/2006/10/26/detecting-bitlocker.aspx
+       //     https://docs.microsoft.com/en-us/archive/blogs/si_team/detecting-bitlocker
+       //     
https://web.archive.org/web/20200720030153/https://docs.microsoft.com/en-us/archive/blogs/si_team/detecting-bitlocker
        //
        // Recognise GRUB2 core.img just by any of the possible first 4 bytes of x86 CPU
        // instructions it starts with.