Broken Link in Work Items

[StratumWare]

In work_items.md line # 89

The link for ldp-bbs2020 is broken:

[ldp-bbs2020](https://w3c-ccg.github.io/ldp-bbs2020/)

I see there is a vc-di-bbs but that is for v2023, not v2020.

[wip-abramson]

Thanks for this.

I think I will just replace ldp-bbs2020 with the 2023 version you reference.

Although there is a broader issue that the whole of the work items markdown is out of date and needs a review