Revert "ci: turn off the "upstream-systemd-ci" ppa"

This reverts commit d4ff79bbe1f33fb17e7add3bd520c08f405a79b1.

diff --git a/.github/workflows/ubuntu-build-check.sh b/.github/workflows/ubuntu-build-check.sh
index 3b5c7296a74a29ca047ba3d291c7c5183acb5ffb..75fc36fffb10fcf1b5664e509d294a4bfa3bdcf3 100755 (executable)
--- a/.github/workflows/ubuntu-build-check.sh
+++ b/.github/workflows/ubuntu-build-check.sh
@@ -85,7 +85,7 @@ else
 fi
 
 # PPA with some newer build dependencies (like zstd)
-#add-apt-repository -y ppa:upstream-systemd-ci/systemd-ci
+add-apt-repository -y ppa:upstream-systemd-ci/systemd-ci
 apt-get -y update
 apt-get -y build-dep systemd
 apt-get -y install "${PACKAGES[@]}"