docs: minor cleanup of part 1 and 3 of ISQ series

docs/blog/posts/isq-part-1-introduction.md

@@ -15,6 +15,7 @@ In this series, we will describe:
 
 - What is ISQ?
 - Which engineering problems does ISQ help to solve and how?
+- How to model and implement it in the programming language?
 - What is missing in the ISQ, and why is that a problem?
 
 <!-- more -->

docs/blog/posts/isq-part-3-modelling-isq.md

@@ -419,5 +419,5 @@ All of the above features improve the safety of our library and the products tha
 
 ## To be continued...
 
-In the next part of this series, we will present how our ISQ model helps to address the remaining
-issues described in the [Part 2](isq-part-2-problems-when-isq-is-not-used.md) of our series.
+In the next part of this series, we will present how we can implement our ISQ model in a C++
+programming language and we will point out some of the first issues that stand in our way.