Add release.yml to aid pre-release release notes generation

Currently this is only for pre-release builds as main releases usually
use hand-written release notes. However, eventually main release notes
may use this as part of the full release notes to allow people to look
at the full list of changes, but I haven't decided if that's desired
yet as it may just be duplicate information.

Author: ychin

.github/release.yml

@@ -0,0 +1,7 @@
+# Customize GitHub release notes generation. This is only used for pre-release builds for now as
+# main releases have hand-written release notes.
+changelog:
+  exclude:
+    labels:
+      - dependencies
+      - Non User Facing