⬆ Update LICENSE copyright year (#950)

* ⬆ Update LICENSE copyright year

This should really include community contributors, [too](https://github.com/bitcoin/bitcoin?tab=MIT-1-ov-file#readme).

* 📅 Set initial year ranges

For precedent start:
Community - stellar-deprecated/docs#3
SDF - stellar-deprecated/docs@466ef29

LICENSE

@@ -187,7 +187,8 @@
  same "printed page" as the copyright notice for easier
  identification within third-party archives.
 
- Copyright 2022 Stellar Development Foundation
+ Copyright 2014 - 2024 Stellar Development Foundation
+ Copyright 2014 - 2024 Stellar Open Source Developers
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.