docs: cleanup changelog

Author: cmoog

CHANGELOG.md

@@ -3,7 +3,14 @@
 ## [Unreleased 0.5.0]
 
 - Package `sqls` language server into `vscode-sql-notebook`.
-  - When running on a compatible arch/os, notebooks will now
-    benefit from enhacned typed autocomplete and hover information
-    when connected to a valid database connection.
+  - When running on a compatible arch/os, notebooks can now
+    benefit from intelligent autocomplete and hover information
+    when connected to a valid database connection. To enable this unstable
+    feature, set `SQLNotebook.useLanguageServer: true` in settings.
 - New configuration option for query timeout in milliseconds. Defaults to 30000.
+
+```json
+{
+  "SQLNotebook.queryTimeout": 30000
+}
+```