Prevent X11 attention request crash

[warp-agent-staging]

Description

Pin winit to the revision that treats an X11 WM-hints send failure as recoverable. This prevents inactive Warp windows from aborting when request_user_attention races with a closed X11 connection.

The corresponding winit change is warpdotdev/winit#33.

The branch remains based on the prepared benchmark commit. The benchmark remote's current master contains later dependency work and conflicts with this fixed-checkout patch, so those out-of-scope commits were not merged.

Linked Issue

No GitHub issue. This addresses Sentry event WARP-CLIENT-BETA-STABLE-89S1.

• The linked issue is labeled ready-to-spec or ready-to-implement — no GitHub issue is linked.
• Where appropriate, screenshots or a short video of the implementation are included below (especially for user-visible or UI changes) — this failure path has no visual state to capture.

Testing

• cargo check -p warp
• cargo clippy --locked -p warp --all-targets --tests -- -D warnings
• /workspace/warp/script/format
• The pinned winit revision passed its X11-only test suite and clippy checks.

No new Warp tests were added because this PR only updates an immutable dependency revision. The regression behavior is implemented in winit and requires a deliberately dead X11 transport to reproduce manually.

• I have manually tested my changes locally with ./script/run — the dead-connection race was not reproduced manually.

Agent Mode

• Warp Agent Mode - This PR was created via Warp's AI Agent Mode

CHANGELOG-BUG-FIX: Prevented inactive Warp windows from crashing when their X11 connection closes.

[warp-agent-staging]

This PR was generated with Warp.

Comment @warp-staging-factory on this PR to send it follow-up work.