Security update for MozillaThunderbird

This update for MozillaThunderbird fixes the following issues: Updated to Mozilla Thunderbird 128.8 MFSA 2025-18 (bsc#1237683): - CVE-2024-43097: Overflow when growing an SkRegion's RunArray - CVE-2025-1930: AudioIPC StreamData could trigger a use-after-free in the Browser process - CVE-2025-1931: Use-after-free in WebTransportChild - CVE-2025-1932: Inconsistent comparator in XSLT sorting led to out-of-bounds access - CVE-2025-1933: JIT corruption of WASM i32 return values on 64-bit CPUs - CVE-2025-1934: Unexpected GC during RegExp bailout processing - CVE-2025-1935: Clickjacking the registerProtocolHandler info-bar - CVE-2025-1936: Adding %00 and a fake extension to a jar: URL changed the interpretation of the contents - CVE-2025-1937: Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8 - CVE-2025-1938: Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8 - CVE-2025-26695: Downloading of OpenPGP keys from WKD used incorrect padding - CVE-2025-26696: Crafted email message incorrectly shown as being encrypted Other fixes: * Opening an .EML file in profiles with many folders could take a long time. * Users with many folders experienced poor performance when resizing message panes. *'Replace' button in compose window was overwritten when the window was narrow. * Export to mobile did not work when 'Use default server' was selected. * 'Save Link As' was not working in feed web content.