build(deps): bump ws from 8.21.0 to 8.21.1

[dependabot]

Bumps ws from 8.21.0 to 8.21.1.

Release notes

Sourced from ws's releases.

8.21.1

Bug fixes

• Empty fragments are now counted toward the limit (a2f4e7c0).
• The default values of the maxBufferedChunks and maxFragments options have been reduced (f197ac65).

Commits

• ae1de54 [dist] 8.21.1
• 8e9511b [ci] Trust Coveralls Homebrew tap
• f197ac6 [fix] Lower default values of maxBufferedChunks and maxFragments
• 8df8265 [ci] Update actions/checkout action to v7
• a2f4e7c [fix] Count empty fragments toward the limit (#2329)
• e79f912 [pkg] Approve install scripts for bufferutil and utf-8-validate
• 4ea355d [doc] Document 32-bit signed integer coercion for option values
• 2120f4c [example] Remove uuid dependency
• 4c534a6 [security] Add latest vulnerability to SECURITY.md
• See full diff in compare view

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[metacritical]

Landed and verified together in 888e1ff (build(deps): bump p-limit, ws, @agentclientprotocol/sdk, e2b, lightningcss) — all five bumps applied at once, then gated with repo-wide typecheck, the acp / subagent-acp / acp-snapshot / e2b / web-search-browser / connection suites (614 tests), and the web frontend build. The PR checks were red on the stale base (repo CI is failing on old bases), so verification was done locally against current main.

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