fix typo

Author: leebyron

src/components/Conf/Seo/index.tsx

@@ -27,7 +27,7 @@ export default function SeoConf(props: {
       <meta property="og:title" content={title} />
       <meta property="og:description" content={description} />
       <meta property="og:image" content={image} />
-      <meta properpty="og:image:alt" content="GraphQLConf 2023 hosted by the GraphQL Foundation. September 19-21, 2023. San Francisco Bay Area, California" />
+      <meta property="og:image:alt" content="GraphQLConf 2023 hosted by the GraphQL Foundation. September 19-21, 2023. San Francisco Bay Area, California" />
       <meta name="twitter:site" content="@graphql" />
       <meta name="twitter:card" content="summary_large_image" />
       <meta name="twitter:title" content={twitterTitle} />