feat: change timeout in approval handler

[tkimura4]

Description

In some cases, even if the lane change is approved, it will time out in the approval_handler and the lane change will not be executed.
It is a temporary fix for that

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Codecov Report

❗ No coverage uploaded for pull request base (beta/v0.2.1@700a826). Click here to learn what that means.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             beta/v0.2.1     #40   +/-   ##
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  Coverage               ?   0.00%           
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  Files                  ?      34           
  Lines                  ?    4873           
  Branches               ?       0           
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  Hits                   ?       0           
  Misses                 ?    4873           
  Partials               ?       0           

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[taikitanaka3]

LGTM