board/update-thumb.sh: Use /bin/bash (not sh) in #! line.

Signed-off-by: Jim Mussared <[email protected]>

Author: jimmo

boards/update-thumb.sh

@@ -1,3 +1,3 @@
-#!/bin/sh
+#!/bin/bash
 rm */*.thumb.jpg
 for file in */*; do convert $file -thumbnail 200 ${file/.jpg/.thumb.jpg}; done