Add another Renovate grouping (#2279)

Author: trask

.github/renovate.json5

@@ -159,6 +159,12 @@
         'com.gradle:develocity-gradle-plugin',
       ],
     },
+    {
+      groupName: 'bouncycastle packages',
+      matchPackageNames: [
+        'com.bouncycastle:**',
+      ],
+    },
     {
       // pinned version for compatibility with java 8 JFR parsing
       matchUpdateTypes: [