Update migration guides to use relative links for improved navigation

- Changed links in the migration guides from absolute to relative paths for better consistency and accessibility.
- Updated references in the migration guide from version 5.x to 6.x and from 6.x to 7.x to reflect the new link structure.

Author: Raffaele Farinaro

docs/partials/_migrate-6-to-7.mdx

@@ -7,7 +7,7 @@ While not all features and functionalities are impacted, it is likely you will n
 ## Updating for Deprecated APIs
 
 :::tip[Version 5.x Users]
-If your app is still using version 5.x of the Scandit Barcode Scanner SDK, you will need to first migrate to version 6.x before migrating to version 7.x. Please refer to the [migration guide from 5.x to 6.x](/migrate-5-to-6.md) for more information.
+If your app is still using version 5.x of the Scandit Barcode Scanner SDK, you will need to first migrate to version 6.x before migrating to version 7.x. Please refer to the [migration guide from 5.x to 6.x](../migrate-5-to-6) for more information.
 :::
 
 Version 7.0 includes the removal of all APIs that were deprecated throughout the 6.x series. For the simplest migration process, we recommend you:

docs/partials/_migrate-7-to-8.mdx

@@ -7,7 +7,7 @@ While not all features and functionalities are impacted, it is likely you will n
 ## Updating for Deprecated APIs
 
 :::tip[Version 5.x/6.x Users]
-If your app is still using version 5.x or 6.x of the Scandit Barcode Scanner SDK, you will need to first migrate to version 6.x and/or 7.x before migrating to version 8.x. Please refer to the [migration guide from 5.x to 6.x](/migrate-5-to-6.md) and [migration guide from 6.x to 7.x](/migrate-6-to-7.md) for more information.
+If your app is still using version 5.x or 6.x of the Scandit Barcode Scanner SDK, you will need to first migrate to version 6.x and/or 7.x before migrating to version 8.x. Please refer to the [migration guide from 5.x to 6.x](../migrate-5-to-6) and [migration guide from 6.x to 7.x](../migrate-6-to-7) for more information.
 :::
 
 Version 8.0 includes the removal of all APIs that were deprecated throughout the 7.x series. For the simplest migration process, we recommend you: