[2.3] Annex K - Fix bullet list rendering issue + JSON code highlight

[bact]

• Add one blank line before the bullet list to fix rendering issue by MkDocs similar to what has reported in #825
• Add JSON format tags

The page https://spdx.github.io/spdx-spec/v2.3/how-to-use/

[bact]

I have checked the CI of 2.3, it uses mkdocs without mike.

Which means it will not recognize other versions of spec and there's a possibility that it can overwrite https://github.com/spdx/spdx-spec/blob/gh-pages/index.html - which will makes other version redirections break.

Until we certain about 2.3 CI / have update the CI to use mike, I will put this PR as draft to avoid the merge that can trigger CI.

[bact]

Need to update the publish CI to new branch names first (see PR #1172), before this PR can go further.

[bact]

https://spdx.github.io/spdx-spec/v2.3/how-to-use/ the bullet list got fixed now