add combo to stopwords, update cmd/generate

cmd/generate/config/rules/stopwords.go

@@ -1484,4 +1484,6 @@ var DefaultStopWords = []string{
 	"boot",
 	"book",
 	"branch",
+	"combination",
+	"combo",
 }

config/gitleaks.toml

@@ -2222,4 +2222,5 @@ stopwords= [
     "book",
     "branch",
     "combination",
+    "combo",
 ]