Fix missing required argument for update_lane_size script (PP-524)

[jonathangreen]

Description

Add default of None to _db arg for the update_lane_size script.

Motivation and Context

Working on another issue I noticed that running the update_lane_size script fails with:

Traceback (most recent call last):
  File "bin/update_lane_size", line 11, in <module>
    UpdateLaneSizeScript().run()
TypeError: __init__() missing 1 required positional argument: '_db'

This appears to have come in as part of #1268.

How Has This Been Tested?

Ran script locally.

Checklist

• I have updated the documentation accordingly.
• All new and existing tests passed.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (58b43c4) 90.25% compared to head (42d5724) 90.26%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1420   +/-   ##
=======================================
  Coverage   90.25%   90.26%           
=======================================
  Files         229      229           
  Lines       29694    29694           
  Branches     6779     6785    +6     
=======================================
+ Hits        26801    26802    +1     
+ Misses       1854     1853    -1     
  Partials     1039     1039           

see 1 file with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[tdilauro]

🎸

Should be good once one of the API test checks re-runs.