Add CHANGELOG.md (#384)

* Add CHANGELOG.md

Add known issue for loading Perfetto output with latest version of the Perfetto UI.

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Co-authored-by: Peter Park <[email protected]>

Author: dgaliffiAMD

CHANGELOG.md

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+# Changlog for Omnitrace
+
+Full documentation for Omnitrace is available at
+[https://rocm.docs.amd.com/projects/omnitrace/en/latest](https://rocm.docs.amd.com/projects/omnitrace/en/latest).
+
+## Omnitrace v1.11.2 for ROCm 6.2.1
+
+### Known Issues
+
+* Perfetto can no longer open Omnitrace proto files.
+Loading the Perfetto trace output `.proto` file in `ui.perfetto.dev` can result
+in a dialog with the message, "Oops, something went wrong! Please file a bug."
+The information in the dialog will refer to an "Unknown field type." The workaround
+is to open the files with the previous version of the Perfetto UI found at
+[https://ui.perfetto.dev/v46.0-35b3d9845/#!/](https://ui.perfetto.dev/v46.0-35b3d9845/#!/).