Changelog generator: get all merge requests

This fixes older releases not appearing in the changelog.

merged

Integration merge request: https://git.seco.com/seco-ne/yocto/infrastructure/ci-test/minimal-srcrev/-/merge_requests/88

Integration merge request: https://git.seco.com/seco-ne/yocto/infrastructure/ci-test/minimal-foo/-/merge_requests/276

Integration merge request: https://git.seco.com/seco-ne/yocto/infrastructure/ci-test/minimal-bar/-/merge_requests/234

Integration merge request: https://git.seco.com/seco-ne/yocto/infrastructure/ci-test/minimal-foo/-/merge_requests/277

Integration merge request: https://git.seco.com/seco-ne/yocto/infrastructure/ci-test/minimal-manifest/-/merge_requests/512

Integration merge request: https://git.seco.com/seco-ne/yocto/infrastructure/ci-test/minimal-manifest/-/merge_requests/513

Integration merge request: seco-ne/3rd-party/kuk/uboot-imx-kuk!101 (merged)

mentioned in merge request seco-ne/3rd-party/kuk/uboot-imx-kuk!101 (merged)

Integration merge request: seco-ne/kernel/modules/gfplatdetect!66 (merged)

mentioned in merge request seco-ne/kernel/modules/gfplatdetect!66 (merged)

Integration merge request: seco-ne/kernel/modules/egalaxi2c!69 (merged)

mentioned in merge request seco-ne/kernel/modules/egalaxi2c!69 (merged)

Integration merge request: seco-ne/kernel/linux-guf!177 (merged)