Fix typos on GraphQLConf banner (graphql#1450)

Author: yurishevtsov

src/pages/conf/index.tsx

@@ -33,7 +33,7 @@ export default () => {
                 </div>
                 <div className="flex gap-2 items-center mb-6 font-medium">
                   <GlobeIcon />
-                  <span>San Fransisco Bay Area, CA</span>
+                  <span>San Francisco Bay Area, CA</span>
                 </div>
               </div>
               <div className="flex justify-center gap-4 flex-row">

src/pages/index.tsx

@@ -24,7 +24,7 @@ export default ({ pageContext }: PageProps<{}, { sourcePath: string }>) => {
               The offical GraphQL conference, by the GraphQL Foundation
             </span>
             <span className="mt-2 font-bold">
-              SEPTEMBER 19-21, 2023 • SAN FRANCISO BAY AREA, CA
+              SEPTEMBER 19-21, 2023 • SAN FRANCISCO BAY AREA, CA
             </span>
             <div>
               <a className="button" href="/conf/#attend">