refactor: update Python variables link in Introduction to Python blog…

… post

_posts/2020-03-20-introduction-to-pytrhon.md

@@ -70,6 +70,6 @@ Feel free to explore these resources as you begin your journey with Python!
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 [^footnote]: **Next Steps**: In the next post, we'll dive into {% raw %}
-[**Python variables**]({% post_url _posts/2020-03-20-introduction-to-pytrhon.md %})
+[**Python variables**](_posts/2020-03-20-introduction-to-pytrhon.md)
 {% endraw %} to get you familiar with manipulating data using Python. Stay tuned and happy coding!