Bump boto3 from 1.21.25 to 1.21.27 (#246)

[//]: # (dependabot-start)
⚠️  **Dependabot is rebasing this PR** ⚠️ 

Rebasing might not happen immediately, so don't worry if this takes some time.

Note: if you make any changes to this PR yourself, they will take precedence over the rebase.

---

[//]: # (dependabot-end)

Bumps [boto3](https://github.com/boto/boto3) from 1.21.25 to 1.21.27.
<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>1.21.27</h1>
<ul>
<li>api-change:<code>ec2</code>: [<code>botocore</code>] This is release adds support for Amazon VPC Reachability Analyzer to analyze path through a Transit Gateway.</li>
<li>api-change:<code>ssm</code>: [<code>botocore</code>] This Patch Manager release supports creating, updating, and deleting Patch Baselines for Rocky Linux OS.</li>
<li>api-change:<code>batch</code>: [<code>botocore</code>] Bug Fix: Fixed a bug where shapes were marked as unboxed and were not serialized and sent over the wire, causing an API error from the service.</li>
</ul>
<h1>1.21.26</h1>
<ul>
<li>api-change:<code>lambda</code>: [<code>botocore</code>] Adds support for increased ephemeral storage (/tmp) up to 10GB for Lambda functions. Customers can now provision up to 10 GB of ephemeral storage per function instance, a 20x increase over the previous limit of 512 MB.</li>
<li>api-change:<code>config</code>: [<code>botocore</code>] Added new APIs GetCustomRulePolicy and GetOrganizationCustomRulePolicy, and updated existing APIs PutConfigRule, DescribeConfigRule, DescribeConfigRuleEvaluationStatus, PutOrganizationConfigRule, DescribeConfigRule to support a new feature for building AWS Config rules with AWS CloudFormation Guard</li>
<li>api-change:<code>transcribe</code>: [<code>botocore</code>] This release adds an additional parameter for subtitling with Amazon Transcribe batch jobs: outputStartIndex.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/boto/boto3/commit/24b0426cb9aa37602ee9aa116ad537acaee18dfb"><code>24b0426</code></a> Merge branch 'release-1.21.27'</li>
<li><a href="https://github.com/boto/boto3/commit/c7958925abebf8671fc83c0509966291a646689f"><code>c795892</code></a> Bumping version to 1.21.27</li>
<li><a href="https://github.com/boto/boto3/commit/c7e7129a4ed5bd07d1fb93f830fb47e2968b3055"><code>c7e7129</code></a> Add changelog entries from botocore</li>
<li><a href="https://github.com/boto/boto3/commit/cdd3c0fbb3bffb1f57fa0f885bb033545b281881"><code>cdd3c0f</code></a> Merge branch 'release-1.21.26'</li>
<li><a href="https://github.com/boto/boto3/commit/5a8eaa762fca9c03e43203575f47a2941b32df9f"><code>5a8eaa7</code></a> Merge branch 'release-1.21.26' into develop</li>
<li><a href="https://github.com/boto/boto3/commit/f01682d56b013d0f1681e05ecd79ee4ecf24cf22"><code>f01682d</code></a> Bumping version to 1.21.26</li>
<li><a href="https://github.com/boto/boto3/commit/3d2aa5a45b8d4b4b96bbc4018dbda0026446a6b0"><code>3d2aa5a</code></a> Add changelog entries from botocore</li>
<li><a href="https://github.com/boto/boto3/commit/e28adfc22ae5d26a696685705d3e61ce40cc4450"><code>e28adfc</code></a> Merge branch 'release-1.21.25' into develop</li>
<li>See full diff in <a href="https://github.com/boto/boto3/compare/1.21.25...1.21.27">compare view</a></li>
</ul>
</details>
<br />


[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=boto3&package-manager=pip&previous-version=1.21.25&new-version=1.21.27)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
- `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)


</details>