Update name

Use generic 6.828 url (without year)

Update name
b818915f · Frans Kaashoek · 308a3b88 · b818915f
--- a/README
+++ b/README
@@ -6,7 +6,7 @@ ACKNOWLEDGMENTS

 xv6 is inspired by John Lions's Commentary on UNIX 6th Edition (Peer
 to Peer Communications; ISBN: 1-57398-013-7; 1st edition (June 14,
-2000)). See also http://pdos.csail.mit.edu/6.828/2016/xv6.html, which
+2000)). See also https://pdos.csail.mit.edu/6.828/, which
 provides pointers to on-line resources for v6.

 xv6 borrows code from the following sources:
@@ -24,7 +24,7 @@ Boyd-Wickizer, Anton Burtsev, Cody Cutler, Mike CAT, Tej Chajed, eyalz800,
 Nelson Elhage, Saar Ettinger, Alice Ferrazzi, Nathaniel Filardo, Peter
 Froehlich, Yakir Goaron,Shivam Handa, Bryan Henry, Jim Huang, Alexander
 Kapshuk, Anders Kaseorg, kehao95, Wolfgang Keller, Eddie Kohler, Austin
-Liew, Imbar Marinescu, Yandong Mao, mataness, Hitoshi Mitake, Carmi
+Liew, Imbar Marinescu, Yandong Mao, Matan Shabtay, Hitoshi Mitake, Carmi
 Merimovich, Mark Morrissey, mtasm, Joel Nider, Greg Price, Ayan Shafqat,
 Eldar Sehayek, Yongming Shen, Cam Tenny, tyfkda, Rafael Ubal, Warren
 Toomey, Stephen Tu, Pablo Ventura, Xi Wang, Keiichi Watanabe, Nicolas
@@ -45,6 +45,6 @@ BUILDING AND RUNNING XV6
 To build xv6 on an x86 ELF machine (like Linux or FreeBSD), run
 "make". On non-x86 or non-ELF machines (like OS X, even on x86), you
 will need to install a cross-compiler gcc suite capable of producing
-x86 ELF binaries. See https://pdos.csail.mit.edu/6.828/2018/tools.html.
+x86 ELF binaries (see https://pdos.csail.mit.edu/6.828/).
 Then run "make TOOLPREFIX=i386-jos-elf-". Now install the QEMU PC
 simulator and run "make qemu".