maint: Make update-authors.sh executable when not going via a shell

Signed-off-by: Simon McVittie <smcv@collabora.com>

diff --git a/maint/update-authors.sh b/maint/update-authors.sh
index 9718811e610509b752c4451b1619b5a1658ff5a2..c8d5c3f49059392f554ceaaa2f6de8c5f1bc7fd0 100755 (executable)
--- a/maint/update-authors.sh
+++ b/maint/update-authors.sh
@@ -1,3 +1,4 @@
+#!/bin/sh
 # Copyright 2010 Lennart Poettering
 # Copyright 2022 Simon McVittie
 # SPDX-License-Identifier: MIT