add audeering base model to metadata

README.md

@@ -27,6 +27,8 @@ model-index:
     - type: uar
       name: Unweighted Average Recall
       value: 0.6499883154795764
+base_model:
+- audeering/wav2vec2-large-robust-12-ft-emotion-msp-dim
 ---
 
 # Speech Emotion Recognition Model