DOC Fix wrong link title for PCA in "Dim. red."
<p class="card-text">Reducing the number of random variables to consider.</p>
<p class="card-text"><strong>Applications:</strong> Visualization, Increased efficiency</br>
<strong>Algorithms:</strong>
- <a href="modules/decomposition.html#pca">k-Means</a>,
+ <a href="modules/decomposition.html#pca">PCA</a>,
<a href="modules/feature_selection.html#feature-selection">feature selection</a>,
<a href="modules/decomposition.html#nmf">non-negative matrix factorization</a>,
and <a href="modules/decomposition.html#decompositions">more...</a></p>
