Add develocity renovate grouping (#2276)

Author: trask

.github/renovate.json5

@@ -152,6 +152,13 @@
         'com.fasterxml.jackson.core:**',
       ],
     },
+    {
+      groupName: 'develocity packages',
+      matchPackageNames: [
+        'com.gradle.develocity',
+        'com.gradle:develocity-gradle-plugin',
+      ],
+    },
     {
       // pinned version for compatibility with java 8 JFR parsing
       matchUpdateTypes: [