Update ubuntu Docker tag to v26

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ubuntu	final	major	24.04 → 26.04
ubuntu		major	24.04 → 26.04

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[fossabot]

You have no credits left. Reach out to autoupdates@fossa.com and we'll top you up.

Credits are consumed when dependency updates are reviewed or proposed.

Re-run with @fossabot analyze.

Mute out-of-credit notifications until next month (expires 2026-06-01T00:00:00.000Z)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[fossabot]

No Issues

All SAST findings were determined to be false positives, test code, or non-actionable. No real security issues require attention.

---

fossabot analyzed this PR using SAST security analysis (changed files only).

[fossabot]

You have no credits left. Reach out to autoupdates@fossa.com and we'll top you up.

Credits are consumed when dependency updates are reviewed or proposed.

Re-run with @fossabot analyze.

Mute out-of-credit notifications until next month (expires 2026-08-01T00:00:00.000Z)

[sonarqubecloud]

Quality Gate failed

Failed conditions
C Security Rating on New Code (required ≥ A)
E Maintainability Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

💡 Need a hand with PR review? Try Gitar by Sonar!