docs: link consultancy

Author: posva

packages/docs/cookbook/migration-v2-v3.md

@@ -1,6 +1,8 @@
 # Migrating from v2 to v3
 
-Pinia v3 is a _boring_ major release with no new features. It drops deprecated APIs and updates major dependencies. It only supports Vue 3. If you are using Vue 2, you can keep using v2. You can probably just update Pinia's version but this guide is here to help you in case you encounter any issues.
+Pinia v3 is a _boring_ major release with no new features. It drops deprecated APIs and updates major dependencies. It only supports Vue 3. If you are using Vue 2, you can keep using v2. If you need help, [book help with Pinia's author](https://cal.com/posva/consultancy).
+
+For most users, the migration should require **no change**. This guide is here to help you in case you encounter any issues.
 
 ## Deprecations