Update ZAP to tip. (#24506)

diff --git a/integrations/docker/images/chip-build/Dockerfile b/integrations/docker/images/chip-build/Dockerfile
index eb47a43..e0ce5af 100644
--- a/integrations/docker/images/chip-build/Dockerfile
+++ b/integrations/docker/images/chip-build/Dockerfile
@@ -183,7 +183,7 @@
 #       for a uniform update, a separate update script exists:
 #
 #       scripts/tools/zap/version_update.py
-ENV ZAP_VERSION=v2023.01.09-nightly
+ENV ZAP_VERSION=v2023.01.18-nightly
 RUN set -x \
     && mkdir -p /opt/zap-${ZAP_VERSION} \
     && cd /opt/zap-${ZAP_VERSION} \
diff --git a/integrations/docker/images/chip-build/version b/integrations/docker/images/chip-build/version
index 03fbc0d..73d06a8 100644
--- a/integrations/docker/images/chip-build/version
+++ b/integrations/docker/images/chip-build/version
@@ -1 +1 @@
-0.6.31 Version bump reason: Updating ZAP to v2023.01.09-nightly
+0.6.32 Version bump reason: Updating ZAP to v2023.01.18-nightly
diff --git a/scripts/tools/zap/version_update.py b/scripts/tools/zap/version_update.py
index 9f51c56..152db95 100755
--- a/scripts/tools/zap/version_update.py
+++ b/scripts/tools/zap/version_update.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright (c) 2023 Project CHIP Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");