update git attributes

.gitattributes

@@ -33,3 +33,5 @@ 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
+severus[[:space:]].png filter=lfs diff=lfs merge=lfs -text
+severus.png filter=lfs diff=lfs merge=lfs -text