Add SunPro license as notice.

This augments the rolled-back approach in 403157534 with a filter to make sure
the classifier doesn't induce the license incorrectly.

PiperOrigin-RevId: 425904539
diff --git a/v2/scoring.go b/v2/scoring.go
index 61f1e6c..9912e97 100644
--- a/v2/scoring.go
+++ b/v2/scoring.go
@@ -168,6 +168,7 @@
 				"PHP":                              {"php"},
 				"SISSL":                            {"sun standards"},
 				"SGI-B":                            {"silicon graphics"},
+				"SunPro":                           {"sunpro"},
 				"X11":                              {"x consortium"},
 			}