fix: schema for web socket server type

[alexander-akait]

• This is a bugfix
• This is a feature
• This is a code refactor
• This is a test update
• This is a docs update
• This is a metadata update

For Bugs and Features; did you add new tests?

Yes

Motivation / Use-Case

false is allowed only on for whole option, not for type

Breaking Changes

No, because it was broken before

Additional Info

No

[codecov]

Codecov Report

Merging #3913 (26875e0) into master (af44710) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3913   +/-   ##
=======================================
  Coverage   92.79%   92.79%           
=======================================
  Files          14       14           
  Lines        1346     1346           
  Branches      467      467           
=======================================
  Hits         1249     1249           
  Misses         90       90           
  Partials        7        7           

Impacted Files	Coverage Δ
bin/cli-flags.js	100.00% <ø> (ø)

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[snitin315]

Good catch. Let's fix CI.