Fix image path (#659)

* Fix image path

* fix typo

* Update visualization.md

Author: svchb

docs/src/visualization.md

@@ -16,11 +16,15 @@ Follow these steps to view the exported VTK files in ParaView:
 5. Hold the left mouse button to move the solution around.
 
 You will now see the following:
-![image](https://github.com/svchb/TrixiParticles.jl/assets/10238714/45c90fd2-984b-4eee-b130-e691cefb33ab)
+![image](https://github.com/user-attachments/assets/383d323a-3020-4232-9dc3-682b0afe8653)
+
+It is useful to make the particles larger.
+For this, **first** make sure you have "fluid_1.pvd" highlighted in the "Pipeline Browser" then in the "Properties" window in the bottom left change "Point Size" to a larger value.
+![image](https://github.com/user-attachments/assets/6e975d2c-82ed-4d53-936b-bb0beafaf515)
 
 To now view the result variables **first** make sure you have "fluid_1.pvd" highlighted in the "Pipeline Browser" then select them in the variable selection combo box (see picture below).
 Let's, for example, pick "density". To now view the time progression of the result hit the "play button" (see picture below).
-![image](https://github.com/svchb/TrixiParticles.jl/assets/10238714/7565a13f-9532-4a69-9f81-e79505400b1c)
+![image](https://github.com/user-attachments/assets/10dcf7eb-5808-4d4d-9db8-4beb25b5e51a)
 
 ## API