Security update for MozillaThunderbird

This update for MozillaThunderbird fixes the following issues: Update to Mozilla Thunderbird 140.6 bsc1254551. MFSA 2025-96 CVE-2025-14321: use-after-free in the WebRTC: Signaling component. CVE-2025-14322: sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component...