Update to Stratum ONL image to v1.4.1

Change-Id: I24c943faf91e657a046f3d1f16a147a788d5d422
diff --git a/defaults/main.yml b/defaults/main.yml
index 0f45934..b2bfcf8 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -6,10 +6,10 @@
 
 onieboot_installers:
   - url: >-
-      https://github.com/opennetworkinglab/OpenNetworkLinux/releases/download/v1.4.0/ONL-wedge100bf-32qs_ONL-OS_2020-11-04.1944-64100e9_AMD64_INSTALLED_INSTALLER
-    checksum: "sha256:25dc880a8a685fbf2f7009231ee08e40a9622cd943e040ea4f302e8199c51875"
+      https://github.com/opennetworkinglab/OpenNetworkLinux/releases/download/v1.4.1/ONL-wedge100bf-32qs_ONL-OS_2020-12-04.2146-66f5d94_AMD64_INSTALLED_INSTALLER
+    checksum: "sha256:b7356af8178fbcfce29563cffc0af4feec2c8e025b739c41bedbf6070c7e4201"
 
 onieboot_default_installer: >-
-  ONL-wedge100bf-32qs_ONL-OS_2020-11-04.1944-64100e9_AMD64_INSTALLED_INSTALLER
+  ONL-wedge100bf-32qs_ONL-OS_2020-12-04.2146-66f5d94_AMD64_INSTALLED_INSTALLER
 
 onieboot_web_root: "/srv/sites/default"