Dependencies Link in README is invalid

[frankbenoitbosch]

[Java Dependencies / BOM](https://modelcontextprotocol.github.io/java-sdk/quickstart/#dependencies) - Java dependencies and BOM.

seems the file is moved to docs/quickstart.md
[Java Dependencies / BOM](https://modelcontextprotocol.github.io/java-sdk/docs/quickstart/#dependencies) - Java dependencies and BOM.