Update .vitepress/config.ts

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: tac0turtle

.vitepress/config.ts

@@ -278,7 +278,7 @@ function sidebarHome() {
               link: "/guides/evm/single",
             },
             {
-              text: "reth state backup",
+              text: "Reth State Backup",
               link: "/guides/evm/reth-backup",
             },
           ]