fix(object_merger): fixed sync_queue_size parameter

[FranzAlbers]

Description

#4994 introduced a minor bug, because a new parameter was not passed appropriately:

[object_association_merger_node-45] terminate called after throwing an instance of 'rclcpp::exceptions::InvalidParameterTypeException'
[object_association_merger_node-45]   what():  parameter 'sync_queue_size' has invalid type: Wrong parameter type, parameter {sync_queue_size} is of type {integer}, setting it to {string} is not allowed.

Tests performed

Not applicable.

Effects on system behavior

Not applicable.

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[yukkysaito]

LGTM

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (27220a8) 15.81% compared to head (ae7e75d) 15.81%.
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5058   +/-   ##
=======================================
  Coverage   15.81%   15.81%           
=======================================
  Files        1581     1581           
  Lines      109896   109895    -1     
  Branches    34411    34411           
=======================================
  Hits        17375    17375           
+ Misses      73394    73393    -1     
  Partials    19127    19127           

Flag	Coverage Δ		*Carryforward flag
differential	0.00% <ø> (?)
total	15.81% <ø> (+<0.01%)	⬆️	Carriedforward from 27220a8

*This pull request uses carry forward flags. Click here to find out more.

Files Changed	Coverage Δ
...ol/operation_mode_transition_manager/src/state.cpp	0.00% <ø> (ø)
...ol/operation_mode_transition_manager/src/state.hpp	0.00% <ø> (ø)

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