Docs: Fix classifier in install shortcode

Author: rozza

docs/reference/layouts/shortcodes/install.html

@@ -60,8 +60,8 @@
     <dependency>
         <groupId>org.mongodb</groupId>
         <artifactId>{{$artifactId}}</artifactId>
-        <version>{{$version}}</version>{{- if $classifier -}}
-        <classifier>{{$classifier}}</classifier>{{- end -}}
+        &lt;version&gt;{{$version}}&lt;/version&gt;{{- if $classifier }}
+        &lt;classifier&gt;{{$classifier}}&lt;/classifier&gt;{{- end }}
     &lt;/dependency&gt;
 &lt;/dependencies&gt;