anchor.diff:  ** update any mention of `latest` -> `{page-isisrel}`
   +
   This should be in hyperlinks, `<a href="docs/...">`
  ++
  +NOTE: that this isn't performed in the docs branch (xref:#create-doc-branch[previous section]) because the supplemental files are _not_ versioned as a doc component:
   
   * Now update `site.yml`
   +
  
positive.code: 
  [#update-the-algolia-search-index]
  == Update the Algolia search index
  
  == Index the site
  
  Create a `algolia.env` file holding the `APP_ID` and the admin `API_KEY`, in the root of `isis-site`:
  
  
negative.code: 
  First, we update all versions in `antora.yml`:
  
  * Update all `antora.yml` files:
  +
  [source,bash,subs="attributes+"]
  ----
  find . -name antora.yml -exec sed -i 's/latest/{page-isisrel}/g' {} \;
  ----
  
  * Commit all these changes:
  +
  