docs(): replace :::info Example with :::example

Author: njelich

docs/build/opl/hyperlane/pingpong-example.md

@@ -18,7 +18,7 @@ You'll learn how to:
 
 We recommend using [Hardhat] for an easy-to-follow experience.
 
-:::info Example Code
+:::example Code
 
 You can find the contracts and hardhat tasks for deployment and execution
 in our [demo-opl repository][opl].

docs/build/tools/foundry.mdx

@@ -191,7 +191,7 @@ To run tests add a new file in the `tests/` directory. Run tests with:
 ```shell
 forge test
 ```
-:::info Example: Foundry  
+:::example Foundry  
 
 Visit the Sapphire ParaTime repository to download the [Foundry][foundry-example]
 example.  

docs/node/grpc.mdx

@@ -58,7 +58,7 @@ the following behavior:
   that you already have from Let's Encrypt,
 - `internal.sock` of the Oasis node is accessible at `/node/data/internal.sock`.
 
-:::info Example hostnames
+:::example hostnames
 
 This chapter uses various hostnames under the `example.com` domain. These only
 serve as an example and in a real deployment you should replace them with your