Update Summary_Studies_Assays.md

_additional_information/Summary_Studies_Assays.md

 ```mermaid
 graph LR;
-    Investigation-->study1_Characterization_khd4D;
+    Investigation-->study1_Chapter1 Loss of Khd4 causes defects in polar growth of infectious hyphae;
     study1_Characterization_khd4D-->assay1_microscopy_yeast;
     study1_Characterization_khd4D-->assay2_microscopy_hyphae;
 
@@ -51,4 +51,4 @@ graph LR;
 
 
 
-```
+```
\ No newline at end of file