docs: fix repo links and update command for create project (#164)

Co-authored-by: Matt Kane <mkane@cloudflare.com>

docs/src/content/docs/getting-started.mdx

@@ -20,17 +20,17 @@ This guide walks you through creating your first EmDash site, from installation
 <Tabs>
 <TabItem label="npm">
 ```bash 
-npm create astro@latest -- --template emdash
+npm create emdash@latest
 ```
 </TabItem>
 <TabItem label="pnpm">
 ```bash 
-pnpm create astro@latest --template emdash
+pnpm create emdash@latest
 ```
 </TabItem>
 <TabItem label="yarn">
 ```bash 
-yarn create astro --template emdash
+yarn create emdash
 ```
 </TabItem>
 </Tabs>

docs/src/content/docs/index.mdx

@@ -9,7 +9,7 @@ hero:
       link: /getting-started/
       icon: right-arrow
     - text: View on GitHub
-      link: https://github.com/withastro/emdash
+      link: https://github.com/emdash-cms/emdash
       icon: external
       variant: minimal
 ---