bill-of-materials: regenerate

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

bill-of-materials.json

@@ -408,8 +408,8 @@
 		"project": "gopkg.in/yaml.v2",
 		"licenses": [
 			{
-				"type": "The Unlicense",
-				"confidence": 0.35294117647058826
+				"type": "Apache License 2.0",
+				"confidence": 1
 			},
 			{
 				"type": "MIT License",