chore(deps): update actions/stale action to v9 (#56)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/stale](https://github.com/actions/stale) | action | major |
`v8.0.0` -> `v9.0.0` |

---

### Release Notes

<details>
<summary>actions/stale (actions/stale)</summary>

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

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

#### Breaking changes

​1. Action is now stateful: If the action ends because of
[operations-per-run](https://github.com/actions/stale#operations-per-run)
then the next run will start from the first unprocessed issue skipping
the issues processed during the previous run(s). The state is reset when
all the issues are processed. This should be considered for scheduling
workflow runs.
2\. Version 9 of this action updated the runtime to Node.js 20. All
scripts are now run with Node.js 20 instead of Node.js 16 and are
affected by any breaking changes between Node.js 16 and 20.
​

#### What else Changed

1. Performance optimization that removes unnecessary API calls by
[@&#8203;dsame](https://github.com/dsame)
[#&#8203;1033](https://github.com/actions/stale/pull/1033/) fixes
[#&#8203;792](https://github.com/actions/stale/issues/792)
2. Logs displaying current github API rate limit by
[@&#8203;dsame](https://github.com/dsame)
[#&#8203;1032](https://github.com/actions/stale/pull/1032) addresses
[#&#8203;1029](https://github.com/actions/stale/issues/1029)
    ​\
For more information, please read the [action
documentation](https://github.com/actions/stale#readme) and its
[section about
statefulness](https://github.com/actions/stale#statefulness)

#### New Contributors

- [@&#8203;jmeridth](https://github.com/jmeridth) made their first
contribution in
[https://github.com/actions/stale/pull/984](https://github.com/actions/stale/pull/984)
- [@&#8203;nikolai-laevskii](https://github.com/nikolai-laevskii) made
their first contribution in
[https://github.com/actions/stale/pull/1020](https://github.com/actions/stale/pull/1020)
- [@&#8203;dusan-trickovic](https://github.com/dusan-trickovic) made
their first contribution in
[https://github.com/actions/stale/pull/1056](https://github.com/actions/stale/pull/1056)
- [@&#8203;aparnajyothi-y](https://github.com/aparnajyothi-y) made
their first contribution in
[https://github.com/actions/stale/pull/1110](https://github.com/actions/stale/pull/1110)

**Full Changelog**: actions/stale@v8...v9.0.0

</details>

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.github/workflows/stale.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       # yamllint disable-line rule:comments
-      - uses: actions/stale@1160a2240286f5da8ec72b1c0816ce2481aabf84 # v8.0.0
+      - uses: actions/stale@28ca1036281a5e5922ead5184a1bbf96e5fc984e # v9.0.0
         with:
           # yamllint disable rule:line-length
           stale-issue-message: "This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 10 days."