Rename hishab_bn_fastconformer.nemo to titu_stt_bn_fastconformer.nemo

hf_hub looks looks at this URL `https://huggingface.co/hishab/titu_stt_bn_fastconformer/resolve/main/titu_stt_bn_fastconformer.nemo. As there is no model named that way this model can not be loaded using code snippet in the model card. So, renaming the model file so that it works again.

.gitattributes

@@ -34,3 +34,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.zst filter=lfs diff=lfs merge=lfs -text
 *tfevents* filter=lfs diff=lfs merge=lfs -text
 hishab_bn_fastconformer.nemo filter=lfs diff=lfs merge=lfs -text
+titu_stt_bn_fastconformer.nemo filter=lfs diff=lfs merge=lfs -text