TOC hack

[github-actions[bot]]

https://github.com/groton-school/knowledgebase/blob/757961371913d04e9cf50d11977469ef225df443/apps/ui/src/UI/TOC/index.ts#L27

            parseInt(h.tagName.substring(h.tagName.length - 1)) - 1
          );
        });
        toc.append(builder.finalize().firstElementChild!); // TODO TOC hack
        Helper.log(`built TOC`);
      }
    }

[battis]

duplicate of #28