Fix double quote (#5)

Author: fmenezes

entrypoint.sh

@@ -4,4 +4,4 @@ DIR=$1
 TOKEN=${2:-$GITHUB_TOKEN}
 FORMAT='::{{ToLower .Severity.Name}} file={{.Position.FilePath}},line={{.Position.StartLine}},col={{.Position.StartColumn}}::{{.Message}}'
 
-codeownerslint -f $FORMAT -d $DIR -t $TOKEN
+codeownerslint -f "$FORMAT" -d "$DIR" -t "$TOKEN"