fix links to images

docs/ifigures_api.md

@@ -157,7 +157,7 @@ Inputs for interactive figures are range sliders (including specially coloured `
     ```
     produces 
 
-    ![Annotation example](./assets/annotation_example.png)
+    ![Annotation example](../assets/annotation_example.png)
 
 !!! tip "Why should one use annotations?"
     Modern figures in reserach papers are often dense with information,
@@ -201,7 +201,7 @@ Some special commands are defined by default for use in equation environment
     ```
     results in
 
-    ![highlighted equations](./assets/equation_example.png)
+    ![highlighted equations](../assets/equation_example.png)
 
 ## Quantum state visualisations
 
@@ -295,7 +295,7 @@ Some special commands are defined by default for use in equation environment
 
     plt.show()
     ```
-    ![tst](./assets/dm_example.png)
+    ![tst](../assets/dm_example.png)
 
 !!! tip "Why use coloured density matrixes"
     They are capable of quickly conveying numerical results, arguably providing