Add collection banner image and display at the top of the model card

.gitattributes

@@ -33,3 +33,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.zip filter=lfs diff=lfs merge=lfs -text
 *.zst filter=lfs diff=lfs merge=lfs -text
 *tfevents* filter=lfs diff=lfs merge=lfs -text
+banner.jpg filter=lfs diff=lfs merge=lfs -text

README.md

@@ -33,6 +33,7 @@ model-index:
       type: rtf
       value: 0.0546
 ---
+![Mizo Automatic Speech Recognition (ASR) Models v3.0](banner.jpg)
 
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