Improved how the statefile last modified date is updated

plugins/git/git_commit_behind

@@ -101,6 +101,7 @@ GPLv2
 
 import logging
 import os
+from pathlib import Path
 from random import randint
 import re
 from subprocess import check_output, call, DEVNULL, CalledProcessError
@@ -231,7 +232,9 @@ def do_update_repos():
             logging.error('Repo not found at path %s' %
                           repos_conf[repo_code]['path'])
     logging.debug('Updating the state file')
-    open(conf['state_file'], 'w')
+
+    # 'touch' the state file to update its last modified date
+    Path(conf['state_file']).touch()
 
 
 if len(sys.argv) > 1: