refactor

Signed-off-by: Lixia (Sylvia) Lei <[email protected]>

MIGRATION_GUIDE.md

@@ -25,29 +25,28 @@ In version `v2`, ORAS Go library has been completely refreshed with:
 
 ## Migrating from `v1` to `v2`
 
-1. Update Go dependencies:
-   - Get the `v2` package:
+1. Get the `v2` package
 
     ```sh
     go get oras.land/oras-go/v2
     ```
 
-   - Incorporate the `v2` package in your project:
+2. Import and use the `v2` package
 
     ```go
     import "oras.land/oras-go/v2"
     ```
 
-   - Run:
+3. Run
 
-    ```sh
-    go mod tidy
+   ```sh
+   go mod tidy
     ```
 
-2. Refactor your code:
-   - Since breaking changes are introduced in `v2`, code refactoring is required for migrating from `v1` to `v2`.
-   - The migration can be done in an iterative fashion, as `v1` and `v2` can be imported and used at the same time.  
-   - For comprehensive documentation and examples, please refer to [pkg.go.dev](https://pkg.go.dev/oras.land/oras-go/v2).
+Since breaking changes are introduced in `v2`, code refactoring is required for migrating from `v1` to `v2`.  
+The migration can be done in an iterative fashion, as `v1` and `v2` can be imported and used at the same time.
+
+For comprehensive documentation and examples, please refer to [pkg.go.dev](https://pkg.go.dev/oras.land/oras-go/v2).
 
 ## FAQs