Apply suggestions from code review

Co-authored-by: Erin Shaben <[email protected]>

Author: 0xlukem

.snippets/text/smart-contracts/polkaVM-warning.md

@@ -1,2 +1,2 @@
-!!! smartcontract "PolkaVM"
-    PolkaVM smart contracts with Ethereum compatibility are an **alpha release**.
+!!! smartcontract "PolkaVM Alpha Release"
+    PolkaVM smart contracts with Ethereum compatibility are in **early-stage development and may be unstable or incomplete**.