ignore bouncycastle test dependency from snyk (#586)

Author: jimmyjames

.snyk

@@ -10,5 +10,9 @@ ignore:
     - '*':
       reason: 'test-only dependency, no update available'
       expires: 2023-12-31T00:00:00.000Z
+  SNYK-JAVA-ORGBOUNCYCASTLE-6084022:
+    - '*':
+          reason: 'test-only dependency, no update available'
+          expires: 2023-12-31T00:00:00.000Z
 
 patch: {}