Update actions/github-script action to v9 (#428)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[actions/github-script](https://redirect.github.com/actions/github-script)
| action | major | `v8` → `v9` |

---

### Release Notes

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

###
[`v9`](https://redirect.github.com/actions/github-script/compare/v8...v9)

[Compare
Source](https://redirect.github.com/actions/github-script/compare/v9.0.0...v9.0.0)

###
[`v9.0.0`](https://redirect.github.com/actions/github-script/releases/tag/v9.0.0)

[Compare
Source](https://redirect.github.com/actions/github-script/compare/v8.0.0...v9.0.0)

**New features:**

- **`getOctokit` factory function** — Available directly in the script
context. Create additional authenticated Octokit clients with different
tokens for multi-token workflows, GitHub App tokens, and cross-org
access. See [Creating additional clients with
`getOctokit`](https://redirect.github.com/actions/github-script#creating-additional-clients-with-getoctokit)
for details and examples.
- **Orchestration ID in user-agent** — The `ACTIONS_ORCHESTRATION_ID`
environment variable is automatically appended to the user-agent string
for request tracing.

**Breaking changes:**

- **`require('@&#8203;actions/github')` no longer works in scripts.**
The upgrade to `@actions/github` v9 (ESM-only) means
`require('@&#8203;actions/github')` will fail at runtime. If you
previously used patterns like `const { getOctokit } =
require('@&#8203;actions/github')` to create secondary clients, use the
new injected `getOctokit` function instead — it's available directly in
the script context with no imports needed.
- `getOctokit` is now an injected function parameter. Scripts that
declare `const getOctokit = ...` or `let getOctokit = ...` will get a
`SyntaxError` because JavaScript does not allow `const`/`let`
redeclaration of function parameters. Use the injected `getOctokit`
directly, or use `var getOctokit = ...` if you need to redeclare it.
- If your script accesses other `@actions/github` internals beyond the
standard `github`/`octokit` client, you may need to update those
references for v9 compatibility.

##### What's Changed

- Add ACTIONS\_ORCHESTRATION\_ID to user-agent string by
[@&#8203;Copilot](https://redirect.github.com/Copilot) in
[#&#8203;695](https://redirect.github.com/actions/github-script/pull/695)
- ci: use deployment: false for integration test environments by
[@&#8203;salmanmkc](https://redirect.github.com/salmanmkc) in
[#&#8203;712](https://redirect.github.com/actions/github-script/pull/712)
- feat!: add getOctokit to script context, upgrade
[@&#8203;actions/github](https://redirect.github.com/actions/github) v9,
[@&#8203;octokit/core](https://redirect.github.com/octokit/core) v7, and
related packages by
[@&#8203;salmanmkc](https://redirect.github.com/salmanmkc) in
[#&#8203;700](https://redirect.github.com/actions/github-script/pull/700)

##### New Contributors

- [@&#8203;Copilot](https://redirect.github.com/Copilot) made their
first contribution in
[#&#8203;695](https://redirect.github.com/actions/github-script/pull/695)

**Full Changelog**:
<actions/github-script@v8.0.0...v9.0.0>

</details>

---

### Configuration

📅 **Schedule**: (UTC)

- Branch creation
  - At any time (no schedule defined)
- 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

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/interledger/charts).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4xMTAuMiIsInVwZGF0ZWRJblZlciI6IjQzLjEzOC4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Stephan Butler <stephan@interledger.foundation>

Author: renovate[bot]

.github/workflows/versioning-merge.yml

@@ -48,7 +48,7 @@ jobs:
       run: sudo chmod +x /usr/local/bin/helm
 
     - name: Calculate and stage chart version bumps on main
-      uses: actions/github-script@v8
+      uses: actions/github-script@v9
       with:
         script: |
           // Skip if PR has manual-versioning label

.github/workflows/versioning.yml

@@ -47,7 +47,7 @@ jobs:
             fi
 
         - name: Bump chart versions (no-commit preview on PRs)
-          uses: actions/github-script@v8
+          uses: actions/github-script@v9
           with:
             script: |
                 const { default: runPRVersioning } = await import('${{ github.workspace }}/tooling/runner.js')