Merge pull request #289 from starknet-edu/2.2-introduction

Update introduction section

src/ch02-02-starkli-scarb-katana.md

@@ -57,7 +57,13 @@ To install a specific version, such as `2.3.0`, run:
 
 ## Crafting a Starknet Smart Contract
 
-Begin by initiating a Scarb project:
+Before we proceed with the example, please ensure that the versions of both `scarb` and `starkli` match the specified versions provided below.
+```console
+    scarb --version  # scarb 2.3.1 (0c8def3aa 2023-10-31)
+    starkli --version  # 0.1.20 (e4d2307)
+```
+
+Now begin by initiating a Scarb project:
 
 ```bash
 scarb new my_contract