update changelog 0.3.1

docs/deployment/6_subnet_deployment_generator_changelog.md

@@ -5,6 +5,12 @@ sidebar_position: 6
 
 # Subnet Deployment Generator Changelog
 
+### v0.3.1 - 2024/07/24
+  - Use testnet by default
+  - Remove admin api by default
+  - Added PUBLIC_IP optional config in deployment-generator
+  - Bump coponent versions
+
 ### v0.2.1 - 2024/01/09
   - New generation style, pulls script from github to run multiple docker images instead of generating from single image.
   - New Checkpoint Smart Contract (CSC) deployment image
@@ -23,4 +29,4 @@ sidebar_position: 6
   - Automate CHECKPOINT_CONTRACT copy-paste step (manual action no longer required).
   - PARENTCHAIN_WALLET is no longer required in 'docker.env', the address will be derived from PARENTCHAIN_WALLET_PK. 
   - Disabled parentchain observer in docker-compose.yml, unused for now (due to long startup time).
-  - Bump default subnet components stable versions
+  - Bump default subnet components stable versions