message: Add exception for .resource files from the license check.
  These are config files for renode / robot and the exception is needed to
  merge PRs like
diff: @@ -64,6 +64,7 @@ tools/make/downloads/pigweed/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py \
  -e "\.projbuild" \
  -e "\.properties" \
  -e "\.resc" \
  + -e "\.resource" \
  -e "\.robot" \
  -e "\.txt" \
  -e "\.tpl" \
  