chore(deps): update actions/download-artifact action to v8 (#7056)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[actions/download-artifact](https://redirect.github.com/actions/download-artifact)
| action | major | `v7` → `v8` |

---

### Release Notes

<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)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - Between 12:00 AM and 03:59 AM, only on
Monday ( * 0-3 * * 1 ) (UTC), 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

---

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View the [repository job
log](https://developer.mend.io/github/vortex-data/vortex).

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.github/workflows/docs.yml

@@ -71,7 +71,7 @@ jobs:
     steps:
       # Note, since we provide the job with a CloudFlare scoped API token, we run it in a separate job that doesn't
       # execute any repository code.
-      - uses: actions/download-artifact@v7
+      - uses: actions/download-artifact@v8
         with:
           name: github-pages
       - name: Extract Pages Artifact

.github/workflows/publish.yml

@@ -57,7 +57,7 @@ jobs:
       name: push-to-pypi
       url: https://pypi.org/p/vortex-data
     steps:
-      - uses: actions/download-artifact@v7
+      - uses: actions/download-artifact@v8
         with:
           pattern: wheels-*.zip
           # https://github.com/actions/download-artifact?tab=readme-ov-file#download-all-artifacts
@@ -90,7 +90,7 @@ jobs:
           distribution: "corretto"
           java-version: "17"
       - uses: gradle/actions/setup-gradle@v5
-      - uses: actions/download-artifact@v7
+      - uses: actions/download-artifact@v8
         with:
           pattern: libvortex_jni_*.zip
       - name: Copy native JNI libs

.github/workflows/report-fuzz-crash.yml

@@ -49,13 +49,13 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Download fuzzer logs
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: ${{ inputs.logs_artifact_name }}
           path: ./logs
 
       - name: Download crash artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: ${{ inputs.artifact_name }}
           path: ./crash_artifacts