changed send(room=) to send(to=) in examples

[daavve]

Fix minor inconsistency in documentation regarding examples.

[codecov-commenter]

Codecov Report

Merging #1665 (c554be3) into main (d77de67) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1665   +/-   ##
=======================================
  Coverage   77.80%   77.80%           
=======================================
  Files           3        3           
  Lines         374      374           
  Branches       64       64           
=======================================
  Hits          291      291           
  Misses         60       60           
  Partials       23       23           

Impacted Files	Coverage Δ
src/flask_socketio/__init__.py	72.65% <ø> (ø)

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