chore(deps): update determinatesystems/nix-installer-action action to v16 (#54)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[DeterminateSystems/nix-installer-action](https://redirect.github.com/DeterminateSystems/nix-installer-action)
| action | major | `v15` -> `v16` |

---

### Release Notes

<details>
<summary>DeterminateSystems/nix-installer-action
(DeterminateSystems/nix-installer-action)</summary>

###
[`v16`](https://redirect.github.com/DeterminateSystems/nix-installer-action/releases/tag/v16)

[Compare
Source](https://redirect.github.com/DeterminateSystems/nix-installer-action/compare/v15...v16)

#### What's Changed

- Update `detsys-ts`: Merge pull request
[#&#8203;67](https://redirect.github.com/DeterminateSystems/nix-installer-action/issues/67)
from DeterminateSystems/allow-obliterating-id-token-privs by
[@&#8203;detsys-pr-bot](https://redirect.github.com/detsys-pr-bot) in
[https://github.com/DeterminateSystems/nix-installer-action/pull/128](https://redirect.github.com/DeterminateSystems/nix-installer-action/pull/128)
- Log in to flakehub on existing installs by
[@&#8203;grahamc](https://redirect.github.com/grahamc) in
[https://github.com/DeterminateSystems/nix-installer-action/pull/129](https://redirect.github.com/DeterminateSystems/nix-installer-action/pull/129)

**Full Changelog**:
https://github.com/DeterminateSystems/nix-installer-action/compare/v15...v16

</details>

---

### Configuration

📅 **Schedule**: 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 this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4xOC4yIiwidXBkYXRlZEluVmVyIjoiMzkuMTguMiIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsicmVub3ZhdGUiXX0=-->

Co-authored-by: Renovate Bot <renovate@whitesourcesoftware.com>

.github/workflows/update-flake.yaml

@@ -10,7 +10,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Instal Nix
-        uses: DeterminateSystems/nix-installer-action@v15
+        uses: DeterminateSystems/nix-installer-action@v16
 
       - name: Update flake.lock
         uses: DeterminateSystems/update-flake-lock@v24