fix(ci): bump aw-server-rust submodule to fix time-0.3.30 compile error on Rust 1.85+ (#165)

The submodule was pinned to dc70318 which pulled in time-0.3.30. That version
fails to compile with Rust >= 1.85 due to a type inference regression:

  error[E0282]: type annotations needed for Box<_>
  --> time-0.3.30/src/format_description/parse/mod.rs:83:9

aw-server-rust master (288decb) already carries the fix — its Cargo.lock
pins time-0.3.47 which compiles cleanly on all current stable toolchains.

Fixes the 'Build aw-server-rust' CI failure introduced ~18h ago.

Author: TimeToBuildBob