Update post-tags.md

Author: MichaelCurrin

recipes/jekyll/snippets/post-tags.md

@@ -2,6 +2,16 @@
 
 {% raw %}
 
+## Navigation
+
+```html
+<a href="{{ '/posts/' | relative_url }}">All Posts</a>
+<a href="{{ '/tags/' | relative_url }}">All Tags</a>
+```
+
+
+## Tags of a post
+
 List matching tags on the footer of a post.
 
 Add this to your `_layouts/post.html` file.