chore(deps): update github artifact actions (major) (#374)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[actions/download-artifact](https://redirect.github.com/actions/download-artifact)
| action | major | `v5` -> `v6` |
|
[actions/upload-artifact](https://redirect.github.com/actions/upload-artifact)
| action | major | `v4` -> `v5` |

---

### Release Notes

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

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

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

</details>

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

###
[`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

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Automerge - At any time (no schedule defined).

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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

---

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.github/workflows/apollo.yaml

@@ -37,7 +37,7 @@ jobs:
           PORT: 4000
       - name: Introspect schema
         run: rover subgraph introspect http://localhost:4000 > ${{ env.SCHEMA_FILE }}
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           path: ${{ env.SCHEMA_FILE }}
           name: ${{ env.SCHEMA_ARTIFACT }}

.github/workflows/checks.yaml

@@ -16,7 +16,7 @@ jobs:
     needs: [ prepare_schema ]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: ${{ needs.prepare_schema.outputs.schema_artifact }}
       - name: Install Rover

.github/workflows/deploy.yaml

@@ -22,7 +22,7 @@ jobs:
     needs: [ deploy, prepare_schema ]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: ${{ needs.prepare_schema.outputs.schema_artifact }}
       - name: Install Rover