ci: add BlueOak license now that it is approved by legal

dgp1130 · dgp1130 · commit 65529209bc74 · 2023-04-11T14:32:02.000-07:00
https://skyvine.corp.google.com/issues/1044744690 (cherry picked from commit 59c5ae0)
diff --git a/scripts/validate-licenses.ts b/scripts/validate-licenses.ts
@@ -33,6 +33,7 @@ const allowedLicenses = [
   'Apache-2.0',
   'Python-2.0',
   'Artistic-2.0',
+  'BlueOak-1.0.0',
 
   'BSD-2-Clause',
   'BSD-3-Clause',
