[gtk+] HighContrast/parse-sass.sh: Use a reliable shebang

[Daniel Boles <dboles src gnome org>]

commit 0a0f9718ef9778d37d925be68a6f5c2faa2a5eea
Author: Daniel Boles <dboles src gnome org>
Date:   Fri Mar 3 08:42:05 2017 +0000

    HighContrast/parse-sass.sh: Use a reliable shebang
    
    /usr/bin/sh does not exist on e.g. Debian sid.
    Use the same shebang as Adwaita/parse-sass.sh

 gtk/theme/HighContrast/parse-sass.sh |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/theme/HighContrast/parse-sass.sh b/gtk/theme/HighContrast/parse-sass.sh
index e9cda25..e385f83 100755
--- a/gtk/theme/HighContrast/parse-sass.sh
+++ b/gtk/theme/HighContrast/parse-sass.sh
@@ -1,3 +1,3 @@
-#!/usr/bin/bash
+#!/bin/sh
 
 bundle exec sass --update --sourcemap=none .