wrapper is a bash script not a sh script

src/blenderbim/desktop/blenderbim.sh

@@ -1,10 +1,12 @@
-#!/bin/sh
+#!/bin/bash
 
 # Wrapper script to launch BlenderBIM.
 
 # If the `blender` executable can't be found in your PATH environment, set
 # BLENDER_EXE to the location of your preferred `blender` executable.
 
+#BLENDER_EXE=/opt/blender-3.3/blender
+
 : ${BLENDER_EXE:=blender}
 
 if [[ $# -eq 1 && -f "$@" ]]; then