Bump boto3 from 1.20.44 to 1.20.45 (#172)

Bumps [boto3](https://github.com/boto/boto3) from 1.20.44 to 1.20.45.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/boto/boto3/blob/develop/CHANGELOG.rst">boto3's changelog</a>.</em></p>
<blockquote>
<h1>1.20.45</h1>
<ul>
<li>api-change:<code>ec2</code>: [<code>botocore</code>] X2ezn instances are powered by Intel Cascade Lake CPUs that deliver turbo all core frequency of up to 4.5 GHz and up to 100 Gbps of networking bandwidth</li>
<li>api-change:<code>kafka</code>: [<code>botocore</code>] Amazon MSK has updated the CreateCluster and UpdateBrokerStorage API that allows you to specify volume throughput during cluster creation and broker volume updates.</li>
<li>api-change:<code>connect</code>: [<code>botocore</code>] This release adds support for configuring a custom chat duration when starting a new chat session via the StartChatContact API. The default value for chat duration is 25 hours, minimum configurable value is 1 hour (60 minutes) and maximum configurable value is 7 days (10,080 minutes).</li>
<li>api-change:<code>amplify</code>: [<code>botocore</code>] Doc only update to the description of basicauthcredentials to describe the required encoding and format.</li>
<li>api-change:<code>opensearch</code>: [<code>botocore</code>] Allows customers to get progress updates for blue/green deployments</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/boto/boto3/commit/ec99bb0353142bcb0e2050bda97e5f3adfd2e478"><code>ec99bb0</code></a> Merge branch 'release-1.20.45'</li>
<li><a href="https://github.com/boto/boto3/commit/a5b6f778a59f81ffbc52ca687189b8ca61ace7a1"><code>a5b6f77</code></a> Bumping version to 1.20.45</li>
<li><a href="https://github.com/boto/boto3/commit/bdc8c92b7137b460e5e178ee07ab9b1c4bf2ec6d"><code>bdc8c92</code></a> Add changelog entries from botocore</li>
<li><a href="https://github.com/boto/boto3/commit/f146f2d6300f2295b1379e60abbe62c791c1f5ae"><code>f146f2d</code></a> Merge branch 'release-1.20.44' into develop</li>
<li>See full diff in <a href="https://github.com/boto/boto3/compare/1.20.44...1.20.45">compare view</a></li>
</ul>
</details>
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