Update tables.md - add an additional resource

I added the Codecademy html tables lesson as I believe having a interactive resources for practicing basic syntax would be beneficial.

intermediate_html_css/intermediate_html_concepts/tables.md

@@ -47,3 +47,5 @@ The following questions are an opportunity to reflect on key topics in this less
 This section contains helpful links to related content. It isn't required, so consider it supplemental.
 
 - Pencil & Paper published a great [article about things you can achieve with tables](https://pencilandpaper.io/articles/ux-pattern-analysis-enterprise-data-tables) if you dare to spend some time giving them some love. They suggest some good habits on how you should format your data which makes a huge difference. These are not a list of must dos to a table, but ideas worth keeping in mind for the next time a table is bothering you with how it looks.
+- Codecademy's interactive [HTML Tables](https://www.codecademy.com/courses/learn-html-tables/lessons/html-tables/exercises/why-tables) lesson is a great way to practice table syntax. By guiding you through creating rows, columns, and headers, it helps you turn unstructured data into clear, readable tables.
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