ci: if we are only changing doc/ files, no sanitycheck run

If we are only changing files in doc/*, there is no need to run full
sanitycheck...

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

Author: nashif

scripts/ci/sanitycheck_ignore.txt

@@ -18,6 +18,7 @@ LICENSE
 Makefile
 tests/*
 samples/*
+doc/*
 *.rst
 *.md
 # if we change this file or associated script, it should not trigger a full