fix legend

Author: SvenKlaassen

doc/examples/py_double_ml_cvar.ipynb

@@ -674,7 +674,7 @@
     "ax.grid()\n",
     "\n",
     "ax.plot(df['Quantile'],df['DML CVaR'], color='violet', label='Estimated CVaR')\n",
-    "ax.plot(df['Quantile'],df['CVaR'], color='green', label='True QTE')\n",
+    "ax.plot(df['Quantile'],df['CVaR'], color='green', label='True CVaR')\n",
     "ax.fill_between(df['Quantile'], df['DML CVaR pointwise lower'], df['DML CVaR pointwise upper'], color='violet', alpha=.3, label='Pointwise Confidence Interval')\n",
     "ax.fill_between(df['Quantile'], df['DML CVaR joint lower'], df['DML CVaR joint upper'], color='violet', alpha=.2, label='Joint Confidence Interval')\n",
     "\n",