fix(alert-modal): Radio button is not vertically-aligned

[paulo-eduardo]

SUMMARY

Removing bottom margin to align checkbox with the inputs on his side.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

BEFORE

Screen.Recording.2022-08-19.at.15.36.49.mov

AFTER

Screen.Recording.2022-08-19.at.15.37.43.mov

TESTING INSTRUCTIONS

• Click Settings in the top right corner
• Select Alerts & Reports
• Click + Alert OR switch to the Reports tab (using the tab switcher in the top left) and click + Report

[codecov]

Codecov Report

Merging #21140 (8369131) into master (642a0d7) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #21140   +/-   ##
=======================================
  Coverage   66.26%   66.26%           
=======================================
  Files        1772     1772           
  Lines       67649    67649           
  Branches     7205     7205           
=======================================
  Hits        44825    44825           
  Misses      20981    20981           
  Partials     1843     1843           

Flag	Coverage Δ
javascript	52.08% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...-frontend/src/components/CronPicker/CronPicker.tsx	100.00% <ø> (ø)

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[stephenLYZ]

LGTM. Thanks for the improvement!