chore(deps): update actions/github-script action to v8 (#572)

This PR contains the following updates:

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

---

### Release Notes

<details>
<summary>actions/github-script (actions/github-script)</summary>

###
[`v8`](https://redirect.github.com/actions/github-script/releases/tag/v8):
.0.0

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

##### What's Changed

- Update Node.js version support to 24.x by
[@&#8203;salmanmkc](https://redirect.github.com/salmanmkc) in
[#&#8203;637](https://redirect.github.com/actions/github-script/pull/637)
- README for updating actions/github-script from v7 to v8 by
[@&#8203;sneha-krip](https://redirect.github.com/sneha-krip) in
[#&#8203;653](https://redirect.github.com/actions/github-script/pull/653)

##### ⚠️ Minimum Compatible Runner Version

**v2.327.1**\
[Release
Notes](https://redirect.github.com/actions/runner/releases/tag/v2.327.1)

Make sure your runner is updated to this version or newer to use this
release.

##### New Contributors

- [@&#8203;salmanmkc](https://redirect.github.com/salmanmkc) made their
first contribution in
[#&#8203;637](https://redirect.github.com/actions/github-script/pull/637)
- [@&#8203;sneha-krip](https://redirect.github.com/sneha-krip) made
their first contribution in
[#&#8203;653](https://redirect.github.com/actions/github-script/pull/653)

**Full Changelog**:
<actions/github-script@v7.1.0...v8.0.0>

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, 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
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.github/workflows/squad-heartbeat.yml

@@ -52,7 +52,7 @@ jobs:
 
       - name: Ralph — Apply triage decisions
         if: steps.check-script.outputs.has_script == 'true' && hashFiles('triage-results.json') != ''
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             const fs = require('fs');
@@ -104,7 +104,7 @@ jobs:
       # Copilot auto-assign step (uses PAT if available)
       - name: Ralph — Assign @copilot issues
         if: success()
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           github-token: ${{ secrets.COPILOT_ASSIGN_TOKEN || secrets.GITHUB_TOKEN }}
           script: |

.github/workflows/squad-issue-assign.yml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Identify assigned member and trigger work
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             const fs = require('fs');
@@ -116,7 +116,7 @@ jobs:
       # Separate step: assign @copilot using PAT (required for coding agent)
       - name: Assign @copilot coding agent
         if: github.event.label.name == 'squad:copilot'
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           github-token: ${{ secrets.COPILOT_ASSIGN_TOKEN }}
           script: |

.github/workflows/squad-triage.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Triage issue via Lead agent
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             const fs = require('fs');

.github/workflows/sync-squad-labels.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Parse roster and sync labels
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             const fs = require('fs');