fix internal links

Author: rosieyohannan

docs/guides/modules/optimize/pages/caching.adoc

@@ -455,7 +455,7 @@ If your source code changes frequently, we recommend using fewer, more specific
 
 Even with the narrowest `restore_cache` option (`source-v1-{{ .Branch }}-{{ .Revision }}`), source caching can be greatly beneficial, for example:
 
-* Running repeated builds against the same git revision (for example, with link:../../api/v1/index.html#trigger-a-new-build-by-project-preview[API-triggered builds])
+* Running repeated builds against the same git revision (for example, with link:../../api/v2/index.html#tag/Pipeline/operation/triggerPipelineRun[API-triggered builds])
 * When using workflows, where you might otherwise need to `checkout` the same repository once per workflow job.
 
 However, it is worth comparing build times with and without source caching. `git clone` is often faster than `restore_cache`.

ui/src/partials/landing.hbs

@@ -200,7 +200,7 @@
           <a href="{{{relativize '/guides/integration/outbound-webhooks.html'}}}">Outbound webhooks</a>
         </li>
         <li>
-          <a href="{{{relativize '/api/v2.html'}}}">API v2 Reference</a>
+          <a href="{{{relativize '/api/v2/index.html'}}}">API v2 Reference</a>
         </li>
         <li>
           <a href="{{{relativize '/api/v1/index.html'}}}">API v1 Reference</a>