Update spelling failures check for contributor cheatsheet

Author: cblecker

hack/.spelling_failures

@@ -1,7 +1,4 @@
-contributors/guide/contributor-cheatsheet/README-de.md
-contributors/guide/contributor-cheatsheet/README-fr.md
-contributors/guide/contributor-cheatsheet/README-it.md
-contributors/guide/contributor-cheatsheet/README-pt.md
+contributors/guide/contributor-cheatsheet/README-[a-z]{2}.md
 committee-steering/meeting-notes-archive
 elections/steering/.*/voters.yaml
 events/2014

hack/verify-spelling.sh

@@ -30,4 +30,4 @@ misspell="$(go list -m -f '{{.Dir}}' github.com/client9/misspell)"
 # All the skipping files are defined in hack/.spelling_failures
 skipping_file="${KUBE_ROOT}/hack/.spelling_failures"
 failing_packages=$(echo `cat ${skipping_file}` | sed "s| | -e |g")
-git ls-files | grep -v -e ${failing_packages} | xargs go run "${misspell}/cmd/misspell" -i "" -error -o stderr
+git ls-files | grep -vEe ${failing_packages} | xargs go run "${misspell}/cmd/misspell" -i "" -error -o stderr