fix(deps): update dependency ws to ^8.21.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ws	^8 → ^8.21.0

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Release Notes

websockets/ws (ws)

v8.21.1

Compare Source

Bug fixes

• Empty fragments are now counted toward the limit (a2f4e7c).
• The default values of the maxBufferedChunks and maxFragments options have
  been reduced (f197ac6).

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