chore: fix github capitalisation (#297)

docs/components/banner.tsx

@@ -17,7 +17,7 @@ export function BetaNotice() {
 				href="https://github.com/better-auth/better-auth/issues"
 			>
 				{" "}
-				Github.
+				GitHub.
 			</Link>{" "}
 		</Banner>
 	);

docs/components/features.tsx

@@ -90,7 +90,7 @@ export default function Features({ stars }: { stars: string | null }) {
 							</div>
 						</div>
 						<p className="text-left text-sm mt-2 text-muted-foreground">
-							Allow users to sign in with their accounts, including Github,
+							Allow users to sign in with their accounts, including GitHub,
 							Google, Discord, Twitter, and more.{" "}
 							<a className="text-gray-50" href="#" target="_blank">
 								Learn more

docs/components/sidebar-content.tsx

@@ -420,7 +420,7 @@ export const contents: Content[] = [
 				),
 			},
 			{
-				title: "Github",
+				title: "GitHub",
 				href: "/docs/authentication/github",
 				icon: () => (
 					<svg