Update some links to target main branch.

Author: DenTelezhkin

Documentation/Migration guides/8.0 Migration Guide.md

@@ -105,7 +105,7 @@ You can actually mix and match cells with `ModelTransfer` protocol conformance a
 
 > Please note, that for non-ModelTransfer views, only new style event registration - through `mapping` closure is available.
 
-Example project contains [view controller](https://github.com/DenTelezhkin/DTTableViewManager/blob/master/Example/Controllers/ExamplesListViewController.swift), that was setup using new cell and event registration styles.
+Example project contains [view controller](https://github.com/DenTelezhkin/DTTableViewManager/blob/main/Example/Controllers/ExamplesListViewController.swift), that was setup using new cell and event registration styles.
 
 ### Improved registration methods
 
@@ -155,7 +155,7 @@ Along with [API reference](https://dentelezhkin.github.io/DTTableViewManager/),
 
 This release requires Swift 5.3. Minimum iOS / tvOS deployment targets are unchanged (iOS 11, tvOS 11).
 
-This release heavily relies on where clauses on contextually generic declarations, that are only available in Swift 5.3 - [SE-0267](https://github.com/apple/swift-evolution/blob/master/proposals/0267-where-on-contextually-generic.md).
+This release heavily relies on where clauses on contextually generic declarations, that are only available in Swift 5.3 - [SE-0267](https://github.com/apple/swift-evolution/blob/main/proposals/0267-where-on-contextually-generic.md).
 
 ## Deprecations