docs: changelog for next release

Author: teogeb

packages/config/README.md

@@ -110,3 +110,4 @@ npm run build
 5.5.5: Peaq entrypoints set to same as current mainnet (polygon)
 5.6.0: IoTeX deployment
 5.7.0: IoTeX entrypoints and theGraphUrl added
+5.8.0: Addressed changed for `dev2`