Updated CHANGELOG with references to bug fixes

Author: azonenberg

release-notes/CHANGELOG.md

@@ -0,0 +1,11 @@
+# ngscopeclient change log
+
+This is a running list of significant bug fixes and new features since the last release, which will eventually be merged into release notes for the next version.
+
+## New features since v0.1
+
+* None yet
+
+## Bugs fixed since v0.1
+
+* Crash with vk::OutOfHostMemoryError when application is minimized on a Windows system with an Intel ARC GPU (https://github.com/ngscopeclient/scopehal-apps/issues/893)