Fixed the link to the Linux patch submission guidlines

Change-Id: I0da34f046a0d3e1181dfaf86ad6379e5f5fae538
Signed-off-by: Charles P. Hofer <charles.hofer@ibm.com>
diff --git a/contributing.md b/contributing.md
index 772bada..c4796ab 100644
--- a/contributing.md
+++ b/contributing.md
@@ -98,7 +98,9 @@
 
 The guidelines in the Linux kernel are very useful:
 
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/SubmittingPatches
+https://www.kernel.org/doc/html/latest/process/submitting-patches.html
+
+https://www.kernel.org/doc/html/latest/process/submit-checklist.html
 
 Your contribution will generally need to be reviewed before being accepted.