generate release notes (#7629)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

documentation/releaseNotes/releaseNotes.v9.0.0.md

@@ -0,0 +1,8 @@
+Today we are releasing the 9.0.0 build of the `dotnet monitor` tool. This release includes:
+
+- Hide frames with [`StackTraceHiddenAttribute`](https://learn.microsoft.com/dotnet/api/system.diagnostics.stacktracehiddenattribute) from `/exceptions` and `/stacks`. When retrieving json data these frames are still included but are identified by a new `hidden` field. ([#7532](https://github.com/dotnet/dotnet-monitor/pull/7532))
+- Use the `DOTNET` prefix when detecting environment variables and prefer it over the `COMPlus` prefix. ([#7434](https://github.com/dotnet/dotnet-monitor/pull/7434))
+
+
+
+If you would like to provide additional feedback to the team [please fill out this survey](https://aka.ms/dotnet-monitor-survey?src=rn).