docs: use correct `baseUrl` for astro `editLink` (#507)

Co-authored-by: Adam Spiers <opencode@adamspiers.org>

packages/web/astro.config.mjs

@@ -42,7 +42,7 @@ export default defineConfig({
         },
       ],
       editLink: {
-        baseUrl: `${github}/edit/master/www/`,
+        baseUrl: `${github}/edit/dev/packages/web/`,
       },
       markdown: {
         headingLinks: false,