fixed 1 pic

README.md

@@ -815,7 +815,7 @@ netrem_demo.fit(X_train, y_train)
 ![png](output_3_1_new.png)
 
 
-![png](netrem_estimator_new.PNG)
+![png](netrem_estimator_new.png)
 
 <!-- There is a particularly strong relationship between $TF_{1} \leftrightarrow TF_{2}$ of 0.9 and between $TF_{4} \leftrightarrow TF_{5}$ of 0.75. The remaining relationships among the other TFs is assumed to be the default (edge weight of 0.1). -->
 <!-- Here, $gregulnet_{demo}$ is an object of the *GRegulNet* class. We fit a model using $X_{train}$ and $y_{train}$ data (70 samples). -->