chore(deps): update golang docker tag to v1.21.5

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
golang	final	patch	1.21.4-alpine3.18 -> 1.21.5-alpine3.18
golang		patch	1.21.4 -> 1.21.5

---

Release Notes

golang/go (golang)

### [`v1.21.5`](https://togithub.com/golang/go/compare/go1.21.4...go1.21.5) [Compare Source](https://togithub.com/golang/go/compare/go1.21.4...go1.21.5)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ 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 has been generated by Mend Renovate. View repository job log here.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (27ee438) 75.89% compared to head (aebd107) 75.89%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #174 +/- ## ======================================= Coverage 75.89% 75.89% ======================================= Files 24 24 Lines 1871 1871 ======================================= Hits 1420 1420 Misses 361 361 Partials 90 90 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.