Add release notes for pyOCD v0.40.0 (#597)

Author: TeoMahnic

CHANGELOG.md

@@ -9,7 +9,15 @@ as a dependency.
     - Use with [CDT GDB Adapter extension](https://marketplace.visualstudio.com/items?itemName=eclipse-cdt.cdt-gdb-vscode)
 v2.4.1 or later to work best.
 - Updates included pyOCD distribution to v0.40.0
-    - ToDo: Add release notes.
+    - Implements [#160](https://github.com/Open-CMSIS-Pack/vscode-cmsis-debugger/issues/160): Allow multiple GDB connections to same TCP/IP port.
+    - Fixes [#386](https://github.com/Open-CMSIS-Pack/vscode-cmsis-debugger/issues/386): "Erase device" command fails on ST multi-core devices.
+    - Fixes [#520](https://github.com/Open-CMSIS-Pack/vscode-cmsis-debugger/issues/520): Alif E7 HE core doesn't start after programming.
+    - Performs a hardware reset (nSRST) after flashing to ensure a clean post-load state.
+    - Removes implicit resets between loading multiple application files.
+    - Sets Reset Catch on all cores when performing primary-core reset before flashing.
+    - Refines debug sequence error handling and breakpoint management across resets.
+    - Updates ResetType API for clearer reset type selection (for example when using `monitor reset` command)
+    - Adds missing secure/non-secure core registers (`CONTROL`, `FAULTMASK`, `BASEPRI`, and `PRIMASK`).
 
 ## 1.1.0