Move up example link in README (#594)

In general, links higher up are viewed more than those lower down, as
not all sections are necessarily read. Since many examples work with
copy & paste, This change modifies the position of the introduction in
the README to emphasize this. It's a very minor change.

Author: Yang-33

README.md

@@ -41,6 +41,12 @@ Or install it yourself as:
 gem install line-bot-api
 ```
 
+## Example projects
+We provide examples to help you get started with the SDK.
+They work in your local environment if you have owned your bot account.
+
+Go the [examples](examples/v2) directory for more examples.
+
 ## Synopsis
 ### RBS
 This library provides [RBS](https://github.com/ruby/rbs) files for type checking.\
@@ -305,9 +311,6 @@ request = Line::Bot::V2::MessagingApi::PushMessageRequest.create(
 )
 ```
 
-### More examples
-See the [examples](examples/v2) directory for more examples.
-
 ## Versioning
 This project respects semantic versioning.