scripts/view*: use bash from $PATH (#716)

Existence of /bin/bash is not guaranteed.

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

scripts/view1/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #export DAWN_PS_PREVIEWER="derp"
 

scripts/view11/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #trignometry
 sin ()

scripts/view12/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #trignometry
 sin ()

scripts/view13/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 echo "view2 produces a series of XY slices  a different z locations."
 

scripts/view14/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #trignometry
 sin ()

scripts/view15/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #trignometry
 sin ()

scripts/view2/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 echo "view2 produces a series of XY slices  a different z locations."
 

scripts/view20/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #export DAWN_PS_PREVIEWER="derp"
 

scripts/view3/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 echo "view3 produces a series of XY slices  a different z locations."
 

scripts/view4/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # this is a detector slice
 

scripts/view5/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # this is a detector slice
 

scripts/view50/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #export DAWN_PS_PREVIEWER="derp"
 

scripts/view6/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 echo "view6 produces a series of XY slices  a different z locations."
 

scripts/view7/generate_eps

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 echo "view7 produces a series of XY slices  a different z locations."