Update Ubuntu QEMU qcow2 (20260716 repo update)

Back up the current canonical Ubuntu qcow2 ZIP, then replace it with the 20260716T053042Z-repo-update build. The new image passed the repository smoke test, qemu-img consistency checks, and a live /execute working-directory check.

osworld-v2-ubuntu-x86.before-20260716T053042Z-repo-update.qcow2.zip

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:eb737ae70b49849e24af407de6a518439a23de05a8497096a948334ce0a909aa
+size 14189763267