Quelea CI version 2026.0 : bump to latest Zulu JRE and latest GStreamer

[DeeTigIT]

Latest versions:

• zulu25.30.17-ca-fx-jre25.0.1-win_x64.msi
• gstreamer-1.0-msvc-x86_64-1.26.7.msi

[berry120]

Thanks - I'll do this before final release, but not right now as it'll likely have a new update again before 2026 comes out.