rebuilderd: fetch dbs/packages from the Geo mirror

Update /etc/rebuilderd-sync.conf to use the Geo host mirror instead of
europe.mirror.pkgbuild.com (for added reliability in case the latter's
availability is impacted).

roles/rebuilderd/templates/rebuilderd-sync.conf.j2

@@ -2,32 +2,32 @@
 distro = "archlinux"
 suite = "core"
 architectures = ["x86_64"]
-source = "https://europe.mirror.pkgbuild.com/$repo/os/$arch"
+source = "https://geo.mirror.pkgbuild.com/$repo/os/$arch"
 
 [profile."archlinux-extra"]
 distro = "archlinux"
 suite = "extra"
 architectures = ["x86_64"]
-source = "https://europe.mirror.pkgbuild.com/$repo/os/$arch"
+source = "https://geo.mirror.pkgbuild.com/$repo/os/$arch"
 excludes = [""]
 
 [profile."archlinux-testing"]
 distro = "archlinux"
 suite = "testing"
 architectures = ["x86_64"]
-source = "https://europe.mirror.pkgbuild.com/$repo/os/$arch"
+source = "https://geo.mirror.pkgbuild.com/$repo/os/$arch"
 excludes = [""]
 
 [profile."archlinux-community"]
 distro = "archlinux"
 suite = "community"
 architectures = ["x86_64"]
-source = "https://europe.mirror.pkgbuild.com/$repo/os/$arch"
+source = "https://geo.mirror.pkgbuild.com/$repo/os/$arch"
 excludes = ["cuda*", "tensorflow*", "*pytorch*", "*kube*", "python-tensorflow*"]
 
 [profile."archlinux-community-testing"]
 distro = "archlinux"
 suite = "community-testing"
 architectures = ["x86_64"]
-source = "https://europe.mirror.pkgbuild.com/$repo/os/$arch"
+source = "https://geo.mirror.pkgbuild.com/$repo/os/$arch"
 excludes = ["cuda*", "tensorflow*", "*pytorch*", "*kube*", "python-tensorflow*"]