There's no armadillo emoji but there is a hedgehog and it looks close.

mikemaccana · mikemaccana · commit 7068350d31ee · 2024-06-13T15:39:18.000-04:00
diff --git a/README.md b/README.md
@@ -1,6 +1,6 @@
 # Program Examples
 
-## Onchain program examples for :anchor: Anchor :crab: Native Rust, :snake: Python and Solidity
+## Onchain program examples for :anchor: Anchor :crab: Native Rust, :snake: Python and :hedgehog: Solidity
 
 This repo contains Solana onchain programs (referred to as 'Smart Contracts' in other blockchains).
 
