Update github-actions deps (major) (#29244)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/github-script](https://togithub.com/actions/github-script) |
action | major | `v6` -> `v7` |

---

### Release Notes

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

### [`v7`](https://togithub.com/actions/github-script/compare/v6...v7)

[Compare
Source](https://togithub.com/actions/github-script/compare/v6...v7)

</details>

---

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time (no schedule defined).

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are satisfied.

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rebase/retry checkbox.

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---

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---------

Co-authored-by: Alex Boten <[email protected]>

.github/workflows/build-and-test.yml

@@ -646,7 +646,7 @@ jobs:
     needs: [publish-stable]
     if: startsWith(github.ref, 'refs/tags/v') && github.repository == 'open-telemetry/opentelemetry-collector-contrib'
     steps:
-      - uses: actions/github-script@v6
+      - uses: actions/github-script@v7
         with:
           script: |
             const milestones = await github.rest.issues.listMilestones({

.github/workflows/generate-weekly-report.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v4
       - run: npm install js-yaml
         working-directory: ./.github/workflows/scripts
-      - uses: actions/github-script@v6
+      - uses: actions/github-script@v7
         id: get-issues
         with:
           retries: 3

.github/workflows/milestone-add-to-pr.yml

@@ -13,7 +13,7 @@ jobs:
     if: github.event.pull_request.merged
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/github-script@v6
+      - uses: actions/github-script@v7
         with:
           script: |
             const milestones = await github.rest.issues.listMilestones({