Capitalization leads to duplicate listings

[philsturgeon]

Describe the bug
The same tool coming in from two different repos with slightly different capitalization show up as two different listings.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://tools.openapis.org/categories/converters.html
2. See there is "APIMatic Transformer" and "Apimatic Transformer"

Expected behavior
Perhaps they could be deduplicated by keying them on a slugified version of the name instead of a plain string.

Screenshots