Merge pull request #50 from ovh/update-contributing

chore: update link to DCO inside CONTRIBUTING.rst

Author: rbeuque74

CONTRIBUTING.rst

@@ -31,7 +31,7 @@ of the Linux kernel source tree.
 
 It can be accessed online too:
 
-https://www.kernel.org/doc/Documentation/SubmittingPatches
+https://www.kernel.org/doc/Documentation/process/submitting-patches.rst
 
 You can submit your patches via GitHub