chore(deps): bump aws-sdk from 2.1686.0 to 2.1687.0 in /functions (#1191

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Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.1686.0 to 2.1687.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/aws/aws-sdk-js/releases">aws-sdk's releases</a>.</em></p>
<blockquote>
<h2>Release v2.1687.0</h2>
<p>See <a href="https://github.com/aws/aws-sdk-js/blob/master/CHANGELOG.md">changelog</a> for more information.</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/aws/aws-sdk-js/commit/a3a66e37df4fdf402d1b9af520313dbaf3f98fe6"><code>a3a66e3</code></a> Updates SDK to v2.1687.0</li>
<li><a href="https://github.com/aws/aws-sdk-js/commit/e02cf7aba7bc5ef4c4541ad0742d8f23bba2eae8"><code>e02cf7a</code></a> update getEndpointSuffix for us-isof-south-1 (<a href="https://github.com/aws/aws-sdk-js/issues/4674">#4674</a>)</li>
<li>See full diff in <a href="https://github.com/aws/aws-sdk-js/compare/v2.1686.0...v2.1687.0">compare view</a></li>
</ul>
</details>
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[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=aws-sdk&package-manager=npm_and_yarn&previous-version=2.1686.0&new-version=2.1687.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

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