Fix the explanations plot's labels

The labels for the x and y axis, "Feature" and "Shap Value" respectively, should be inverted:

app.py

@@ -50,8 +50,8 @@ def interpret(*args):
     fig_m = plt.figure(tight_layout=True)
     plt.barh([s[1] for s in scores_desc], [s[0] for s in scores_desc])
     plt.title("Feature Shap Values")
-    plt.ylabel("Shap Value")
-    plt.xlabel("Feature")
+    plt.ylabel("Feature")
+    plt.xlabel("Shap Value")
     plt.tight_layout()
     return fig_m