pw_presubmit: Exclude .ico from copyright check

Change-Id: I3d13774d26e7ec697ae15f23afac118cb31077b3
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/109079
Reviewed-by: Rob Mohr <mohrr@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Pigweed-Auto-Submit: Ted Pudlik <tpudlik@google.com>
diff --git a/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py b/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py
index edf981c..66ca5ce 100755
--- a/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py
+++ b/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py
@@ -559,6 +559,7 @@
     r'\.csv$',
     r'\.elf$',
     r'\.gif$',
+    r'\.ico$',
     r'\.jpg$',
     r'\.json$',
     r'\.png$',