[#90] Fix a typo in design.rst and add the mention of PostgreSQL ve…

…rsions that Stalker is tested with.

docs/source/design.rst

@@ -105,8 +105,9 @@ pipeline:
 
  2. **SQLAlchemy Integration:** Leverages SQLAlchemy for its database backend
     and Object-Relational Mapping (ORM) capabilities, ensuring efficient data
-    management.
-
+    management. Designed PostgreSQL (versions 14 to 17) in mind but not limited
+    to it.
+
  3. **Jinja2 Templates:** Employs Jinja2 for flexible file and folder naming
     conventions. For a structured naming scheme it is possible to define
     templates like:
@@ -132,9 +133,9 @@ pipeline:
  9. **TaskJuggler Integration:** Integrate with TaskJuggler for enhanced task
     management capabilities, supporting basic task attributes.
 
- 9. **Predefined Task Statuses:** Manage task progress efficiently with a
-    pre-defined Task Status Workflow, providing a structured approach to
-    tracking task completion stages.
+ 10. **Predefined Task Statuses:** Manage task progress efficiently with a
+     pre-defined Task Status Workflow, providing a structured approach to
+     tracking task completion stages.
 
 For usage examples see :ref:`tutorial_toplevel`\ .