Bump WebKit

[Jarred-Sumner]

What does this PR do?

Fixes #26556

How did you verify your code works?

[robobun]

^{Updated 6:16 PM PT - Jan 29th, 2026}

❌ @alii, your commit 6f42f12 has 6 failures in Build #36146 (All Failures):

• test/js/bun/net/socket.test.ts - 1 failing on 🍎 13 x64
• test/js/node/http/node-http-backpressure.test.ts - SIGKILL on 🐧 25.04 x64
• test/bundler/compile-windows-metadata.test.ts - 1 failing on 🪟 2019 x64
• test/bundler/compile-windows-metadata.test.ts - 1 failing on 🪟 2019 x64-baseline
• test/js/node/http2/node-http2.test.js - 2 failing on 🪟 2019 x64-baseline
• test/integration/next-pages/test/dev-server.test.ts - 1 failing on 🍎 14 aarch64
• cmake/targets/BuildBun.cmake - cmake error on 🍎 aarch64 - build-cpp
• cmake/targets/BuildBun.cmake - cmake error on 🍎 x64 - build-cpp
• cmake/targets/BuildBun.cmake - cmake error on 🐧 x64 - build-zig
• cmake/targets/BuildBun.cmake - cmake error on 🐧 x64-musl - build-zig
• cmake/targets/BuildBun.cmake - cmake error on 🍎 x64 - build-zig
• cmake/targets/BuildBun.cmake - cmake error on 🐧 x64-musl-baseline - build-cpp
• cmake/targets/BuildBun.cmake - cmake error on 🪟 x64 - build-zig
• cmake/targets/BuildBun.cmake - cmake error on 🐧 aarch64-musl - build-cpp
• cmake/targets/BuildBun.cmake - cmake error on 🐧 x64-baseline - build-zig
• cmake/targets/BuildBun.cmake - cmake error on 🐧 aarch64 - build-zig
• cmake/targets/BuildBun.cmake - cmake error on 🪟 x64-baseline - build-zig
• cmake/targets/BuildBun.cmake - cmake error on 🐧 x64-musl-baseline - build-zig
• cmake/targets/BuildBun.cmake - cmake error on 🐧 x64-asan - build-zig
• cmake/targets/BuildBun.cmake - cmake error on 🐧 aarch64-musl - build-zig
• cmake/targets/BuildBun.cmake - cmake error on 🍎 aarch64 - build-zig
• cmake/targets/BuildBun.cmake - cmake error on 🐧 x64-musl - build-cpp
• cmake/targets/BuildBun.cmake - cmake error on 🐧 x64 - build-cpp
• cmake/targets/BuildBun.cmake - cmake error on 🐧 x64-baseline - build-cpp
• cmake/targets/BuildBun.cmake - cmake error on 🐧 x64-asan - build-cpp
• cmake/targets/BuildBun.cmake - cmake error on 🐧 aarch64 - build-cpp
• cmake/targets/BuildBun.cmake - cmake error on 🪟 x64 - build-cpp
• cmake/targets/BuildBun.cmake - cmake error on 🪟 x64 - build-cpp
• cmake/targets/BuildBun.cmake - cmake error on 🪟 x64-baseline - build-cpp
• cmake/targets/BuildBun.cmake - cmake error on 🪟 x64-baseline - build-cpp

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🧪   To try this PR locally:

bunx bun-pr 26582

That installs a local version of the PR into your bun-26582 executable, so you can run:

bun-26582 --bun