Minor changes

blogs/query_optimization_introduction/query_optimization_introduction.html

@@ -36,7 +36,7 @@ <h1 id="query-optimization---introduction">Query Optimization - Introduction </h
 <p>These topics will lay the foundation for query optimization, will establish a common vocabulary and hopefully make reader motivate for subsequent parts.</p>
 <p>In subsequent parts: I plan to cover following optimizations:</p>
 <ul>
-<li>Filter Push-down</li>
+<li><a href="https://akurmustafa.github.io/blogs/query_optimization_filter_pushdown/query_optimization_filter_pushdown.html">Filter Pushdown</a></li>
 <li>Projection Optimization</li>
 <li>Sort Optimization and Ordering Propagation</li>
 <li>Parallelization of the plan execution</li>

blogs/query_optimization_introduction/query_optimization_introduction.md

@@ -12,7 +12,7 @@ These topics will lay the foundation for query optimization, will establish a co
 
 In subsequent parts: I plan to cover following optimizations:
 
-- Filter Push-down
+- [Filter Pushdown](https://akurmustafa.github.io/blogs/query_optimization_filter_pushdown/query_optimization_filter_pushdown.html)
 - Projection Optimization
 - Sort Optimization and Ordering Propagation
 - Parallelization of the plan execution