Fix blog post link (#720) (#723)

(cherry picked from commit f8bf2d8)

Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com>

Author: mergify[bot]

releasenotes/notes/0.7/0.7-prelude-da0a365f75662bb6.yaml

@@ -15,4 +15,5 @@ prelude: >
        Qiskit Machine Learning to 0.6.
 
   For more context on the changes around Qiskit Machine Learning and the other application projects as well as the
-  Algorithms library in Qiskit, be sure to read this `blog post <https://ibm.biz/BdSyNm>`_.
+  Algorithms library in Qiskit, be sure to read this
+  `blog post <https://medium.com/qiskit/a-new-chapter-for-qiskit-algorithms-and-applications-5baff541e826>`_.