[java] toml: warn about upcoming change enforcing string to have quotes (#14491)

Co-authored-by: Puja Jagani <puja.jagani93@gmail.com>

Author: Delta456

java/src/org/openqa/selenium/grid/config/TomlConfig.java

@@ -31,15 +31,20 @@
 import java.util.List;
 import java.util.Optional;
 import java.util.Set;
+import java.util.logging.Logger;
 import org.openqa.selenium.internal.Require;
 
 public class TomlConfig implements Config {
 
   private final Toml toml;
+  private static final Logger LOG = Logger.getLogger(TomlConfig.class.getName());
 
   public TomlConfig(Reader reader) {
     try {
       toml = JToml.parse(reader);
+      LOG.warning(
+          "Please use quotes to denote strings. Upcoming TOML parser will require this and unquoted"
+              + " strings will throw an error in the future");
     } catch (IOException e) {
       throw new ConfigException("Unable to read TOML.", e);
     } catch (ParseException e) {