fix(broker_bi_chart): fix aspect ratio markup

#1030 (closed)

mobile (before/after):

Screenshot_2024-06-11_at_20.38.43_before Screenshot_2024-06-11_at_20.38.54_after

desktop (before/after):

Screenshot_2024-06-11_at_20.38.14_before Screenshot_2024-06-11_at_20.38.01_after

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