fix: correct license copyright from Anthropic to Mark III Labs (#48)

Fixes #45 - The LICENSE file incorrectly stated Anthropic as the copyright
holder when it should be Mark III Labs, LLC. This was likely a copy-paste
error from the original Anthropic MCP filesystem server template.

Author: jochil

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2024 Anthropic, PBC
+Copyright (c) 2024 Mark III Labs, LLC.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal