Add release notes for pyOCD v0.40.0

[TeoMahnic]

Fixes

• N/A

Changes

• Add release notes for pyOCD v0.40.0

Screenshots

Checklist

• 🤖 This change is covered by unit tests (if applicable).
• 🤹 Manual testing has been performed (if necessary).
• 🛡️ Security impacts have been considered (if relevant).
• 📖 Documentation updates are complete (if required).
• 🧠 Third-party dependencies and TPIP updated (if required).

[jreineckearm]

Thanks, LGTM!