[Service Bus] Update changelog for 7.0.1 (#12989)

This PR adds changelog entry for https://github.com/Azure/azure-sdk-for-js/issues/12983

sdk/servicebus/service-bus/CHANGELOG.md

@@ -2,11 +2,12 @@
 
 ## 7.0.1 (Unreleased)
 
+- Fix the `isNode` check to allow the package to be usable in Electron. [Bug 12983](https://github.com/Azure/azure-sdk-for-js/issues/12983)
+- Fix issue where receiveMessages might return fewer messages than were received, causing them to be potentially locked or lost.
+  [PR 12772](https://github.com/Azure/azure-sdk-for-js/pull/12772)
 - Updates documentation for `ServiceBusMessage` to call out that the `body` field
   must be converted to a byte array or `Buffer` when cross-language
   compatibility while receiving events is required.
-- Fix issue where receiveMessages might return fewer messages than were received, causing them to be potentially locked or lost.
-  [PR 12772](https://github.com/Azure/azure-sdk-for-js/pull/12772)
 
 ## 7.0.0 (2020-11-23)