Update actions/cache action to v6 (#2313)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/cache](https://redirect.github.com/actions/cache) | action |
major | `v5` → `v6` |

---

### Release Notes

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

###
[`v6.1.0`](https://redirect.github.com/actions/cache/releases/tag/v6.1.0)

[Compare
Source](https://redirect.github.com/actions/cache/compare/v6.0.0...v6.1.0)

##### What's Changed

- Bump
[@&#8203;actions/cache](https://redirect.github.com/actions/cache) to
v6.1.0 - handle read-only cache access by
[@&#8203;jasongin](https://redirect.github.com/jasongin) in
[#&#8203;1768](https://redirect.github.com/actions/cache/pull/1768)

**Full Changelog**:
<actions/cache@v6...v6.1.0>

###
[`v6.0.0`](https://redirect.github.com/actions/cache/releases/tag/v6.0.0)

[Compare
Source](https://redirect.github.com/actions/cache/compare/v6.0.0...v6.0.0)

#### What's Changed

- Update packages, migrate to ESM by
[@&#8203;Samirat](https://redirect.github.com/Samirat) in
[#&#8203;1760](https://redirect.github.com/actions/cache/pull/1760)

**Full Changelog**:
<actions/cache@v5...v6.0.0>

###
[`v6`](https://redirect.github.com/actions/cache/compare/v5.0.5...v6.0.0)

[Compare
Source](https://redirect.github.com/actions/cache/compare/v5.1.0...v6.0.0)

</details>

---

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---

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---

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.github/workflows/agent-control-e2e.yml

@@ -51,7 +51,7 @@ jobs:
           targets: >-
             x86_64-unknown-linux-musl
 
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/bin/