Fix display of pnpm and yarn installation command for @solid-js/route… (#947)

Author: NikKasyan

src/routes/guides/routing-and-navigation.mdx

@@ -20,9 +20,17 @@ npm install @solidjs/router
 ```
 </div>
 
-<div id="yarn">```bash frame="none" yarn add @solidjs/router ```</div>
+<div id="yarn">
+```bash frame="none"
+yarn add @solidjs/router
+```
+</div>
 
-<div id="pnpm">```bash frame="none" pnpm add @solidjs/router ```</div>
+<div id="pnpm">
+```bash frame="none"
+pnpm add @solidjs/router
+```
+</div>
 
 <div id="bun">
 ```bash frame="none"