feat: add Sean Sanker Jr to /about page (#299)

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## PR Checklist

- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/boston-ts-website/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

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🛠️

app/routes/about.tsx

@@ -58,6 +58,9 @@ export default function About() {
 				<li>
 					<strong>Xavier Ruiz</strong>
 				</li>
+				<li>
+					<strong>Sean Sanker Jr</strong>
+				</li>
 			</ul>
 			<Heading level={3}>The Website</Heading>
 			<BodyText>

cspell.json

@@ -21,6 +21,7 @@
 		"knip",
 		"Mariah",
 		"packagejson",
+		"Sanker",
 		"Supabase"
 	]
 }