Again, looking good. Especially on the accessibility. One thing often missed in ADA?WCAG checkers is the colors involved in hover. many will just reverse the colors BUT, in the case of hovering over your Categories, that's not a good idea.
If you change the hover color on .list-group-item:hover to #0074A7, you'll be compliant. May be others as well so, check those hovers.
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