Update lumen_index.md

lumen/lumen_index.md

@@ -75,7 +75,7 @@ In total 10 test runs in the simulation domain for different fault scenarios are
 
 ![Figure 3: Examplary system fault](images/systemFault_anonymized.png){ style="display: block; margin: 0 auto;" }
 
-*Figure 3: Examplary system fault in var8*
+*Figure 3: Examplary system fault*
 
 ## Get Access to the Resources
 <a name="resources"></a>