Update COPYING date to now and fix some [skip CI]

ci/license-header.py

@@ -5,20 +5,15 @@ import sys
 
 exit_code = 0
 
-pat1 = re.compile(
+copyright_pat = re.compile(
     r"See the file \"COPYING\" in the main distribution directory for copyright."
 )
 
-# This is the copyright line used within Spicy plugin and popular in
-# Spicy analyzers.
-pat2 = re.compile(r"Copyright \(c\) 2... by the Zeek Project. See COPYING for details.")
-
 
 def match_line(line):
-    for pat in [pat1, pat2]:
-        m = pat.search(line)
-        if m is not None:
-            return True
+    m = copyright_pat.search(line)
+    if m is not None:
+        return True
 
     return False