chore(deps): Bump aws-actions/stale-issue-cleanup from 5 to 6 (#3867)

Bumps [aws-actions/stale-issue-cleanup](https://github.com/aws-actions/stale-issue-cleanup) from 5 to 6.
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/aws-actions/stale-issue-cleanup/commit/e4ca97939734a033ea39a4e812661ee3e8daa66b"><code>e4ca979</code></a> in progress: v6 release</li>
<li><a href="https://github.com/aws-actions/stale-issue-cleanup/commit/92b8e7d6ebf0f6c280fbbf8c6c8bcd936c3ceb00"><code>92b8e7d</code></a> in progress: v6</li>
<li><a href="https://github.com/aws-actions/stale-issue-cleanup/commit/35061ab8d5cae7c19929740b10df341a26415c80"><code>35061ab</code></a> add PR support</li>
<li><a href="https://github.com/aws-actions/stale-issue-cleanup/commit/aa3cf88a3a9449ea8922e4b04a314ea6755896aa"><code>aa3cf88</code></a> add PR support</li>
<li><a href="https://github.com/aws-actions/stale-issue-cleanup/commit/79cd2382574c8997bff8692fde32f23b39849668"><code>79cd238</code></a> generic label/action interface</li>
<li><a href="https://github.com/aws-actions/stale-issue-cleanup/commit/1e9625a5a1b2b8ce58185a2365f0e2d219800f9c"><code>1e9625a</code></a> Initial commit for v6</li>
<li><a href="https://github.com/aws-actions/stale-issue-cleanup/commit/770989b0c8a666e80df3551d34ce1fa2c251f16c"><code>770989b</code></a> build(deps): bump minimist from 1.2.5 to 1.2.6 (<a href="https://github-redirect.dependabot.com/aws-actions/stale-issue-cleanup/issues/140">#140</a>)</li>
<li><a href="https://github.com/aws-actions/stale-issue-cleanup/commit/c6795b366ad780512eaad65286b27dd191b85de4"><code>c6795b3</code></a> build(deps-dev): bump prettier from 2.2.1 to 2.6.2 (<a href="https://github-redirect.dependabot.com/aws-actions/stale-issue-cleanup/issues/141">#141</a>)</li>
<li>See full diff in <a href="https://github.com/aws-actions/stale-issue-cleanup/compare/v5...v6">compare view</a></li>
</ul>
</details>
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</details>

.github/workflows/close-stale-issues.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Stale issue job
     steps:
-    - uses: aws-actions/stale-issue-cleanup@v5
+    - uses: aws-actions/stale-issue-cleanup@v6
       with:
         # Setting messages to an empty string will cause the automation to skip
         # that category