[RTADPA BW Tests] Sprucing summary plot on `index.html` seems to be broken

lhcb-2024-patches.82_Moore_hlt2_and_spruce_bandwidth + lhcb-2024-patches.81_Moore_hlt2_and_spruce_bandwidth_SMOG2

Last time it worked : lhcb-2024-patches.74_Moore_hlt2_and_spruce_bandwidth

I assume this is likely due to a minor bug introduced in lhcb/Moore!3496 (merged) and the associated MRs when the names were changed. There's no discernable error in the logs from me.

Example with and without the bug

With the summary plot working

Without the summary plot working