Make this directly runnable

PeterJCLaw · PeterJCLaw · commit 89fa1212dedb · 2022-04-09T15:19:38.000+01:00
diff --git a/scripts/github-dependencies.py b/scripts/github-dependencies.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 import argparse
 import itertools
 import re
