Feature Request: Support for Milliseconds (%L) in local_time

Thank you for maintaining the gem - it’s a beautifully simple and reliable gem. Is adding **%L** ([Milliseconds](https://docs.ruby-lang.org/en/3.2/strftime_formatting_rdoc.html#label-Time+-28Hour-2C+Minute-2C+Second-2C+Subsecond-29)) support something you might consider, or is it on the roadmap?