Fix link

Author: reakaleek

docs/docset.yml

@@ -19,7 +19,7 @@ external_hosts:
   - checkvist.com
   - commonmark.org
   - github.io
-  - github.blog
+  - github.com
 exclude:
   - '_*.md'
 subs:

docs/migration/guide/how-to-set-up-docs-previews.md

@@ -82,7 +82,7 @@ jobs:
 This workflow is triggered when a PR is either merged or closed. The underlying reusable workflow, deletes the docs from the preview environment.
 
 :::{note}
-We are aware of the security implications of using `pull_request_target` as described in [this blog post](https://github.blog/2020-08-03-github-actions-improvements-for-fork-and-pull-request-workflows/).
+We are aware of the security implications of using `pull_request_target` as described in [this blog post](https://securitylab.github.com/resources/github-actions-preventing-pwn-requests/).
 The workflow never checks out the code and doesn't use any user modifiable inputs (e.g. PR title). 
 :::