Fix nit in PRESUBMIT.py

Change-Id: Icc197948e387a75a05ca92f918b0b459e3c8d01f
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/22583
Reviewed-by: dan sinclair <dsinclair@google.com>
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 19a147d..5d57660 100755
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -19,7 +19,7 @@
 
 def _LicenseHeader(input_api):
     """Returns the license header regexp."""
-    # Accept any year number from 2003 to the current year
+    # Accept any year number from 2019 to the current year
     current_year = int(input_api.time.strftime('%Y'))
     allowed_years = (str(s) for s in reversed(xrange(2019, current_year + 1)))
     years_re = '(' + '|'.join(allowed_years) + ')'