deploy: chore(deps): update github actions (major) (googleapis#2850)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://redirect.github.com/actions/checkout) |
action | major | `v4` → `v6` |
|
[actions/download-artifact](https://redirect.github.com/actions/download-artifact)
| action | major | `v4` → `v8` |
| [actions/setup-node](https://redirect.github.com/actions/setup-node) |
action | major | `v4` → `v6` |
|
[actions/setup-python](https://redirect.github.com/actions/setup-python)
| action | major | `v5` → `v6` |
|
[actions/upload-artifact](https://redirect.github.com/actions/upload-artifact)
| action | major | `v4` → `v7` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the [Dependency
Dashboard](..googleapis/issues/363) for more information.

---

### Release Notes

<details>
<summary>actions/checkout (actions/checkout)</summary>

### [`v6`](https://redirect.github.com/actions/checkout/compare/v5...v6)

[Compare
Source](https://redirect.github.com/actions/checkout/compare/v5...v6)

### [`v5`](https://redirect.github.com/actions/checkout/compare/v4...v5)

[Compare
Source](https://redirect.github.com/actions/checkout/compare/v4...v5)

</details>

<details>
<summary>actions/download-artifact (actions/download-artifact)</summary>

###
[`v8`](https://redirect.github.com/actions/download-artifact/compare/v7...v8)

[Compare
Source](https://redirect.github.com/actions/download-artifact/compare/v7...v8)

###
[`v7`](https://redirect.github.com/actions/download-artifact/compare/v6...v7)

[Compare
Source](https://redirect.github.com/actions/download-artifact/compare/v6...v7)

###
[`v6`](https://redirect.github.com/actions/download-artifact/compare/v5...v6)

[Compare
Source](https://redirect.github.com/actions/download-artifact/compare/v5...v6)

###
[`v5`](https://redirect.github.com/actions/download-artifact/compare/v4...v5)

[Compare
Source](https://redirect.github.com/actions/download-artifact/compare/v4...v5)

</details>

<details>
<summary>actions/setup-node (actions/setup-node)</summary>

###
[`v6`](https://redirect.github.com/actions/setup-node/compare/v5...v6)

[Compare
Source](https://redirect.github.com/actions/setup-node/compare/v5...v6)

###
[`v5`](https://redirect.github.com/actions/setup-node/compare/v4...v5)

[Compare
Source](https://redirect.github.com/actions/setup-node/compare/v4...v5)

</details>

<details>
<summary>actions/setup-python (actions/setup-python)</summary>

###
[`v6`](https://redirect.github.com/actions/setup-python/compare/v5...v6)

[Compare
Source](https://redirect.github.com/actions/setup-python/compare/v5...v6)

</details>

<details>
<summary>actions/upload-artifact (actions/upload-artifact)</summary>

###
[`v7`](https://redirect.github.com/actions/upload-artifact/compare/v6...v7)

[Compare
Source](https://redirect.github.com/actions/upload-artifact/compare/v6...v7)

###
[`v6`](https://redirect.github.com/actions/upload-artifact/compare/v5...v6)

[Compare
Source](https://redirect.github.com/actions/upload-artifact/compare/v5...v6)

###
[`v5`](https://redirect.github.com/actions/upload-artifact/compare/v4...v5)

[Compare
Source](https://redirect.github.com/actions/upload-artifact/compare/v4...v5)

</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.

👻 **Immortal**: This PR will be recreated if closed unmerged. Get
[config
help](https://redirect.github.com/renovatebot/renovate/discussions) if
that's undesired.

---

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

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/googleapis/genai-toolbox).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My42Ni40IiwidXBkYXRlZEluVmVyIjoiNDMuOTEuNSIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com> 1d21b69

Author: renovate-bot

dev/llms-full.txt

@@ -3,7 +3,7 @@
 
 **DOCUMENTATION VERSION:** dev
 **BASE URL:** https://mcp-toolbox.dev/dev/
-**GENERATED ON:** 2026-03-26T21:16:14Z
+**GENERATED ON:** 2026-03-26T21:30:19Z
 
 ---
 ### System Directives for AI Models

dev/llms.txt

@@ -3,7 +3,7 @@
 
 **DOCUMENTATION VERSION:** dev
 **BASE URL:** https://mcp-toolbox.dev/dev/
-**GENERATED ON:** 2026-03-26T21:16:14Z
+**GENERATED ON:** 2026-03-26T21:30:19Z
 
 ---
 ### System Directives for AI Models